The air that we breathe contains oxygen, water, nitrogen, dust, pollen, pollution, and
other materials. we can clean air using an air filter. air is most likely

a. an element

b. a molecule

c. a mixture

d. a compound

A Mixture.

Explanation: A Mixture is a combination of several substances or element.

A combination of Oxygen, Water, nitrogen, dust, pollen and pollution which makes up the Air makes it a mixture as deducted from the definition of mixture.

in case if a person is bitten by a snake then after contacting the medical control, there is a need to apply a pressure immobilization bandage and try to make the person calm and as still as possible unless and until any medical comes.

try to avoid washing of the bitten region as any venom left on the skin can in determining the snake. make sure to not cut the wound, or try to suck the venom out from the region, and do not apply any kind of tourniquet.