Every deliberate action you make, such as pedaling a bike, walking, scratching, or smelling a flower, involves neurons in the nervous system. a) sympathetic
b) somatic
c) parasympathetic
d) autonomic

b. Somatic

Explanation:

The somatic nervous system is one of the divisions of the peripheral nervous system. The somatic nervous system delivers the motor information from the central nervous system to the skeletal muscles only. The skeletal muscles generate the responses which are consciously controlled. Therefore, the somatic nervous system regulates the voluntary movements of the body.

So, the voluntary movements of skeletal muscles such as the movement of limbs during walking, smelling a flower, pedaling, etc. are regulated by the neurons of somatic division.

if the type of the food available changes, then the frequency of beak types will change, because birds with beaks more suited to the available food will be more successful over time.