Fact 1: Better senses have a positive impact on an animal 's survival.

Fact 2: An antelope has such a fine sense of hearing that it senses danger long in advance.

Given the two facts above, answer the question "Which characteristic helps an antelope survive?" with the following options: 
- exoskeleton
 - poor sense of smell
 - bad manners
 - protective bony armor
 - Endocrine system
 - excellent hearing
 - bad vision
 - Males and females


 

      excellent hearing   