Question

male howler monkeys are known for their deep, booming calls, which can be heard from miles away. researchers have found that male howler monkeys call most frequently at dawn and dusk, when rival groups are most likely to be active. the calls serve as a warning to other monkeys to stay away. scientists believe that this behavior is an energy - saving strategy, as vocal displays help establish dominance without the need for direct confrontations. which choice best states the main idea of the text? choose 1 answer: a male howler monkeys call most often at dawn and dusk, when rival groups are also likely to be active. b howler monkeys are known for their loud calls, which can be heard from miles away.

Explanation:

The text focuses on male howler monkeys' vocal - display behavior as an energy - saving strategy to establish dominance. Option A only mentions the time of calls, and option B only mentions the loudness of calls. The main idea is about the purpose of the calls as an energy - saving dominance - establishing behavior.

Answer:

There are no correct options provided among A and B. The main idea should be something about male howler monkeys using vocal displays as an energy - saving strategy to establish dominance.