An animal's water levels are becoming low, and its organs need water to continue functioning. In response to this, the animal's body will send internal signals A. to wait, so that a clean source of water can be found.

B. of hunger, since animals retrieve most of their water through food.

C. to sweat, so the organism knows it is losing too much water.

D. of thirst, so that the organism will go drink water.

what statement best describes the difference between the sympathetic and parasympathetic nervous systems?

the sympathetic nervous system prepares the body for intense physical activity and is often referred to as the fight-or-flight response. the parasympathetic nervous system has almost the exact opposite effect and relaxes the body and inhibits or slows many high energy functions.

since there are no options posted i'll give you a few examples.

a dolphin's flipper, bird's wing, cat's leg.

igneous rocks are formed by solidification of cooled magma (molten rock), with or without crystallization, either below the surface as intrusive (plutonic) rocks or on the surface as extrusive (volcanic) rocks.  

the composition depends on the source magma. there are almost a thousand types of composition found till now.  

hope this