Question

bracken cave is in texas. every summer evening, something strange happens there. as the sun sets, a dark column appears. bats stream from the cave. it can take three hours for all the bats to leave the cave. the column of bats shows up on the radar at the nearby airport. the bats live in bracken cave. there can be millions of bats living there. at night, they come out to eat. bats eat insects. they help farmers. bats eat the insects that would hurt crops. bats also eat mosquitoes. the bats of bracken cave return to mexico each winter. do it! the column of bats is _______. a flat b bright c loud d huge

Explanation:

The text mentions "There can be millions of bats living there" and that it takes three - hours for all the bats to leave the cave, and the column shows up on radar. This implies a large number of bats, so the column is huge.

Answer:

D. huge