Which best describes horse breeding?
a) selective pressure in nature has resulted in different horse and pony breeds.
b) people have selected the most desirable natural traits to produce different horse and pony breeds.
c) people have manipulated the genome of horses and ponies in the lab to produce the breeds we know today.
d) different horse and pony breeds are an example of overcompetition.

brain development. a child's brain undergoes an amazing period of development from birth to three—producing more than a million neural connections each second. the development of the brain is influenced by many factors, including a child's relationships, experiences and environment.

explanation:

the principles and empirical processes of discovery and demonstration considered characteristic of or necessary for scientific investigation, generally involving the observation of phenomena, the formulation of a hypothesis concerning the phenomena, experimentation to test the hypothesis, and development of a conclusion that confirms, rejects, or modifies the hypothesis.