Definition of analyze in your own words.

Analyze examine methodically and in detail the constitution or structure of (something, especially information), typically for purposes of explanation and interpretation.

Explanation:

examine methodically and in detail the constitution or structure of (something, especially information), typically for purposes of explanation and interpretation.

to examine something, especially information, typically for purposes of explanation and interpretation.

Explanation:

nobody is fidda write a whole essay

the pronoun reference replaces a noun, but you have to make sure there's no room for confusion.

in the first sentence "her" could be referring to shely or to the sister. the answer there is "shelly called her sister and told her about the new baby."

in the second sentence "it" could be referring to the roof or the floor. the answer there is "since the roof leaks on the family room floor, we need to repair the roof."