Subdivision of the PNS that controls voluntary activities such as the activation of skeletal muscles.
A. Autonomic Nervous system
B. Central Nervous System
C. Peripheral Nervous System
D. Somatic Nervous System

The peripheral nervous system (PNS) is divided into the somatic nervous system and the autonomic nervous system. The somatic nervous system (SoNS) is the part of the peripheral nervous system associated with the voluntary control of body movements via skeletal muscles.

blue stars have the highest surface temp

stellar distances are usually expressed in light-years

the measure of a star's brightness is called magnitude

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a unit of heredity that is transferred from a parent to offspring and is held to determine some characteristic of the offspring.