Explanation

"Boat is to water" therefore "Plane is to air "

Explanation

'bitch' is used so freely as a term for a female dog,

 mare is an adult female horse 

Explanation

A terrapin is a type of turtle (or more broadly, a reptile). 

The analogy follows the pattern of a specific type of animal to its broader class:

Mynah : Bird

Terrapin : Turtle / Reptile 

Explanation

A glutton is someone who eats excessively, so the relationship is based on behavior.

Similarly, a garrulous person talks excessively, making "Talk" the correct match.

Explanation

Docility : Surrender :: Unrest : Rebellion

Education → doesn’t directly relate to unrest.

Rebellion → yes! Unrest often leads to rebellion.

Illness → not directly connected to unrest in this context.

Hospital → related to illness, not unrest.