Which is the layer underground where all empty spaces are filled with water? O A. Zone of aeration
B. Water table
C. Impermeable rock
D. Zone of saturation

The saturated zone

Explanation: the saturated zone, the level in which the pores of the soil or rock are completely filled with water

Hope it helps :)

D. Zone of saturation.

Explanation:

The zone of saturation is right below the zone of aeration, where the gaps are filled with both air and water.

the endocrine system secretes hormones into blood and other body fluids. these chemicals are important for metabolism, growth, water and mineral balance, and the response to stress. hormones provide feedback to the brain to affect neural processing. reproductive hormones affect the development of the nervous system.

i need