To "err" is to make a "mistake," to do something in error. So, to solve this analogy you need to determine what it is that you make if you "prognosticate." Well, to "prognosticate" is to make a "prediction" about the future. 

"Hypothermia" is an extremely dangerous medical condition resulting from prolonged exposure to the "cold." So, if "hypothermia" is caused by the "cold," what does "oxidation" cause? Well, "oxidation" is the process by which something is made "rusty," how "rust" is formed. Additionally, "erosion" is the process of reducing or moving something through prolonged exposure to wind or waves; "precipitation" is rainfall. 

A "gratuity" is a perk, some special right or advantage conveyed on someone. A "gratuity" is "beneficial" (helpful, useful), so to solve this analogy you need to determine what "solace" is. Well, "solace" is relief or consolation offered in a time of hardship or suffering. "Solace" is therefore "comforting." Additionally, "condescending" means rude and based on the premise that the speaker knows better than the person being spoken to; "invigorating" means energizing, giving vigor to. 

An "allergy" is a notable cause of "sneezing," or, in other words, sneezing can be a symptom of allergies. There is a direct cause and effect relationship in this case. So, to solve this question you must figure out what a symptom of an injury would be. Injuries to the leg aerate main cause of a person "limping" or walking with an impeded gait.

"Scurvy" is a disease caused by lack of vitamins and "malnutrition." "Malnutrition" is not having a sufficient supply of healthy or useful food. So, to solve this analogy you need to determine which of these causes "emphysema." Well, "emphysema" is a lung disease marked by inability to breathe. It is primarily caused by "smoking." 

Corpulent is a synonym for fat, so to solve this analogy you need to find the best possible synonym for diminutive. Since diminutive means tiny the best possible answer choice is small.

Enumerate is a verb which means to list options and therefore is a synonym of list. To solve this analogy you are therefore looking for the best available synonym for bombastic. Bombastic is a noun or adjective used to describe pompous or long-winded language. Verbose is the correct answer, because it means expressed using too many words. For clarification jubilant means very happy; lethargic means tired or physically drained; laconic means brief; intransigent means stubborn.

Polemical is a synonym of argumentative so to solve this analogy you need to find the best available synonym for serene. Serene means quiet and peaceful.

Convivial and gregarious both mean friendly and sociable. You therefore need to identify which of the answer choices is the best available synonym for amiable. Amiable means pleasant and friendly so the correct answer is affable.

Loquacious means talkative, which is a synonym for garrulous. In order to solve this analogy you have to identify which of these answer choices is the best available synonym for prattle. Prattle is an intransitive verb that refers to idle or childish speech that lacks direction. The correct matching definition is "ramble," which means to talk aimlessly. For clarification, circumlocution means indirect or verbose speech; jumble means mix-up; loopy means crazy or silly.