The correct answer depends on what the original question was. TOEFL can be very tricky.
"When I AM around lots of friends, . . ." When I AM around lots of trees. When I AM around nature. The emphasis is on the "be" verb and your relationship, in this example, to the environment and how it makes you FEEL.
"When I HAVE lots of friends around, . . ." When I HAVE lots of food in the freezer. When I HAVE lots of money in my wallet. The emphasis is on the word "have" and what you possess, and what you can DO with what you possess.