Fill in the blank with the correct verb form to complete the sentence.
A kind teacher always makes us _______ better.

A verb is a word that denotes an action or a state.
Causative verbs indicate that one person causes another person to do something for the first person.
'Have', 'get', and 'make' are used as causative verbs.
If 'make' is used as a causative verb, the sentence structure is as follows:
sub1 + make (according to tense) + sub2 + Vbase form + obj.
Example:  We'll make him have the food on time.
The word 'learn' is in its base form.
So, the correct answer is given in option 2).
Complete sentence: A kind teacher always makes us learn better.