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Explanation:

4-option c

5-

homeostasis:the tendency towards a relatively stable equilibrium between interdependent elements, especially as maintained by physiological processes.

excretion:(in living organisms and cells) the process of eliminating or expelling waste matter.

ultrafiltration:Ultrafiltration is the removal of fluid from a patient and is one of the functions of the kidneys that dialysis treatment replaces. Ultrafiltration occurs when fluid passes across a semipermeable membrane (a membrane that allows some substances to pass through but not others) due to a driving pressure.

endotherman:animal that is dependent on or capable of the internal generation of heat.

hydrogen is a compound or a single element and a element is a pure substence that cannot be separated into simpler subtances

clorine is a compound its a chemical substance that forms when two or more different elements combine

so both hydrogen and clorine are compounds

this would be called india