Im confused about the question can you explain
<span>a. they did not co-evolve with the natural species and lack natural controls, like predators</span>
The human brain consumes up to 20% of the energy used the entire human body which is any other single organ. the brain represents inly 2%of the body wheight yet it recieves 15% of the cardiac output and 20% of the total body oxygen consumption.
