I guess it science Oklahoma And ecosystem and protozoans Andrew And thanks
B. larger and more complex
Explanation: As the environment became more unpredictable, bigger brains helped our ancestors survive.
Its B. <span>Australopithecus africanus, Homo erectus, Homo neanderthalensis</span>
The answer is true. These are all signs of communication.
The shivering on a cold day is the body's mode of heat generation.This is a negative feedback mechanism where a change is detected by the body'd internal environment and crafts a mechanism to correct it
