Celina has a water sample that’s contaminated with salt and microorganisms. which method should she use to purify the water?
multiple choice answers below
distillation
filtration
osmosis
reverse osmosis

Second option is  correct.

Explanation:

Filtration is the method of removing impurities solid particles from liquid.

Distillation is the method of removing impurities in a boiling liquid mixture.

Osmosis is the movement of water from low concentration to high concentration through a plasma membrane.

Reverse osmosis is the method of purification of water to remove ions and unnecessary molecules from drinking water.

We have given the situation that "There is a water sample contaminated with salt and micro organisms."

We need to purify the water.

Filtration is the best method to purify the water and remove the salt and micro organisms.

As there is slight difference between filtration and distillation.

In distillation we need to boil the water , so there heat is needed for this whereas in filtration, it just remove solid from fluid without being heated.

Hence, Second option is  correct.

c. heat could easily travel through the molecules in the air and escape/enter the flask. removing the air slows down the heat transfer.