How do farmers contribute to water pollution?

How do farmers contribute to water pollution?
One big reason is the chemicals that they used to be able to let their plant grow well. The water that they use in irrigation sometimes they uses chemicals to it. Farmers also throw chemical wastes to water without thinking the result of this.

A.cells always stay the same.

Explanation:

Homeostasis is the ability of an organism to maintain a stable internal state despite changes in external conditions. The process of homeostasis is important to the survival of both unicellular and multicellular organisms, as mentioned in this question.

Examples of homeostatic process undergone by organisms include:

- Cell division, which allows organisms to grow and repair their damaged parts.

- Making of food during photosynthesis, and production of energy during cellular respiration. This two processes are necessary for the survival of organisms as one produces food and the other synthesizes energy.

- Movement of materials into and out of the cells though the cell membrane, which is required to bring in needed substances and remove unwanted ones.

However, a cell staying the same does not depict any HOMEOSTATIC PROCESS.