Verb,Adjactive,Noun

A verb is an action.

It may be a physical action, such as run, swim, jump.

It may be a mental or abstract action, such as think, consider, satisfy

Verbs have tenses:

jump, jumped, is jumping, has jumped and so on

A noun is a thing.

It may be a physical thing, such as house, car, chair

It may be an abstract thing, such as honor, goodness, confidence

An adjective is a description, such as green, old, big, small

An adjective cannot have a tense. However, some are spelled with –ed or –ing:

Example: The movie was boring

I felt bored

These are usually adjectives of feeling (Click here for more details)

He has a lot of __________.

A) confident

B) confidence

We know that a NOUN must go in the blank, because you can have a THING and a noun is a thing.

Confidence is a noun, so it is the correct answer.

If you are not sure whether a word is a noun, verb or adjective, check your dictionary.