Read the passage.

monkeys

my favorite exhibit at the zoo is the monkey enclosure; the monkeys' antics never fail to bring a smile to my face, no matter how my day is going. i like watching the baby monkeys swing from branch to branch, playfully hitting at one another as they fly by. the other day, one mischievous monkey sat high up in the trees, tossing bits of fruit at the other monkeys on the ground below. his chattering could be heard throughout the zoo as his friends tried to run for cover among the bushes.

which word from the passage best illustrates the feeling of amusement?

hitting

enclosure

monkeys

mischievous