which statements regarding human brain development are true? select all that apply. group of answer choices the ecological brain hypothesis suggests that human brains increased due to the result of living in complex environments humans have the largest brain if you control for body mass, but gorillas have the largest brains of all the apes to increase their brain size humans out of necessity reduced their metabolic rate there are costs to growing and supporting a larger brain which likely indicates that the fitness advantage to such a trait is high