What is blog ? How can it be beneficial to us?​

A blog is a type of website that either for information or entertainment, blogs can be benefical to us because it can teach us new things and even help us socialize with others.

Explanation:

answer; /// (the anagnorisis )

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."