4. in the following sentence, which word is the possessive pronoun being used as an adjective?

he put his hand on the top of the table.

top
his
he
table
5. in the following sentence, what type of verb is the bolded word?

the crowd became restless while waiting for the concert to begin.

linking
mental action
visible action

6. what is the object of the preposition in the following sentence?

brandon returned the magazines to me last week.

me
brandon
week
magazines

The answers are:

4) [B]: his .

5)  Let us assume that the word in bold front is: "became".
 
Based on this assumption, the answer is:
   [A]: linking.

In the sentence given:

"The crowd became restless while waiting for the concert to begin."  ,

 the word: "became" is a linking verb because it links the noun, "crowd", with the adjective, "restless".

6) [A]: me. 

Note: To whom were the magazines returned? To "me".

"Me" is the direct object (of the preposition, "to".).

Hope this helps!

Here are the answers to the given questions above.
4. Based on the given sentence above, the word that is the possessive pronoun being used as an adjective is the word HIS.
5. The verb in this sentence is the word "became" and this is a LINKING VERB.
6. The object of the preposition in the given sentence would be the word "ME".
Hope this answer helps.