Need to pollinate each other
Fallout for strength and war and stuff maybe?
The answer is air pressure because without that the bird would not be able to go up, like a balloon has to have a pump , think of the wings flapping as the pump and the bird itself as a balloon, hope this helped
Genetic method makes scientific research as basis for understanding behavior. This was believed to come from genetics and the environment. Genetics according to this field can strongly influence behavior and accumulates during childhood to adulthood. Environment can create stimulus to push actions and influence attitude.
The correct option is E.
The carrying capacity of a biological specie in an ecosystem refers to the maximum population size of the specie that the environment can sustain indefinitely given all the resources that are available in the environment. When the number of living organism in an ecosystem is above the carrying capacity, the number of death among the specie will increase until the carrying capacity is reached.