<span>positive self talk is the best source of internal motivation.</span>
Hormones are chemical substances that help to regulate processes in the body. Hormones are secreted by glands and travel to their target organs in the bloodstream. Hormones can be used to control human fertility.
I am making a educated guess and saying producers. Plants mostly.
Hunter-gatherer societies are often nomadic. I believe.
Answer:
A
Sound waves radiate outward from a central point.