Cohesion describes water's

a. attraction to other materials
b. neutral ph value
c. attraction to other water molecules
d. ability to dissolve most substances

The correct answer will be option-C.

Explanation:

Cohesion is the property of the same particles to stick together or it is the attractive force between the same particles.

Water molecules exhibit cohesive force between them which binds two or water molecules together. This property of water with adhesive force and surface tension is useful in the transport of water in the plant vessels.

Thus, option-c is the correct answer.

the answer that best describes the relative refractory period in the neuron is the resting membrane potential is restored, but concentrations of sodium and potassium are not restored to their original state.

the refractory period is the time during which another stimulus given to the neuron will not lead to a second potential. thus, because na+ channels are inactivated during this time, additional depolarizing stimuli do not lead to new action potentials.  

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clumped distribution, because you'de have all of the population gathered in a relatively small are.

it's the most common because it provides protection and a mate for reproduction

example: humans, seeweed, cattles, etc.