Answer:
C
Explanation:
It is positively charged and include most of the atom's mass.
There are multiple energy source in the ocean. The one thats probably the most common one are Dams. Although Dams can cause some serious flooding. Another one is Tidal energy. Tidal energy is something that turns the energy of tides into energy through Kinetic motion.<span />
The X symbol looks too much like the multiplication symbol, it also makes using it as a variable more confusing.
They feed on dead, decaying, organic matter.
All of these are necessary, but what you need the most I would say is
D. Movement
Without movement, your body can stiff up, causing muscle problems which can lead to many various things.