Talitha is performing an experiment on how plants get water up to their leaves. She adds two drops of blue food coloring to a beaker of water. Then, she hears a fire alarm and heads outside. When Talitha gets back to the classroom, the water in the beaker is all pale blue. She recognizes that the process of has caused the dye to spread evenly through the water.

b. diffusion

Explanation:

Diffusion is the term that describes the phenomenon where particles of a substance move way from an area where there is a high concentration of that substance to areas of lower concentration.

When Talitha added the two drops of food coloring, their particles spread from where they were dropped which was an area that was concentrated with the dye, to the rest of the water which had a low/ zero concentration of the dye.

oxygen +1 most likely

the water is warmed up by the sun and then it evaporates into the atmosphere. the sunlight warms the water by its heat. water is then cooled down and condensation takes place. the water then finally returns back to the earth by the process of precipitation in the form of rain or ice.

explanation: