Which trait is solely dependent on its environment?

A: a dogs tendancey to bark

B: height

C: eye color

D: ability to type accuratley

I feel very confident the answer is A. all dogs have tendencies to bark at cars, small animals in the outdoors, people, etc.

A: a dogs tendency to bark

Explanation:

Eye color is determined by the parent's genetics, height is defined by both genetics and environment, the ability to type accurately can be influenced by both genetics and environment. Therefore the correct answer is the dog's tendency to bark because they bark as a response to external stimuli.

I hope you find this information useful and interetsing! Good luck!