I don’t understand and I really need help !!

B) You yourself can easily transform your body with a good diet and plenty of exercise.

Explanation:

A pronoun describes a noun or another pronoun. Intensive pronouns have a  

- self or - selves ending, and are used to emphasize the noun or pronoun they refer to, making them more "intense".

Words used as intensive pronouns: myself, yourself, himself, herself, itself, ourselves, yourselves, and themselves.

For example:

Isaiah 43:11 Easy-to-Read Version

11 I myself am the Lord, and there is no other Savior.

Myself doesn't need to be there. It just makes the sentence more "intense". In this sentence, myself is referring to the I in the sentence. Both I and myself refer to the same subject, God.

The sentence that answers the question contains a "-self" word in it (yourself) so that's an automatic clue. In the sentence, yourself and you both refer to the same person, you.

the anecdote makes readers feel sorry for the man’s lack of heritage, then reminds readers that the man has an equally valuable heritage.