The weakest died out and only the intelligent and strong survived to pass on the most useful traits, determining the way a species evolved - growing more intelligent or athletic as a result of these patterns.
The answer is, Geographic barriers. Hope this helps!
Its called homeostasis, the regulation in temperature which can be exhibited thorugh sweating, panting, etc. It helps taking the heat out and all body waste away to regulate the temperature inside an organisms body.
Answer:The answer is the person and the tennis ball :)
Explanation:
