Water is considered a resource.
oil, coal, and natural gas are considered resources.
energy is able to be replaced within the ecosystem for human use.
a farmer who wants to produce the best crop yield will use
when a pollutant increases in concentration at higher levels of the trophic level, can harm organisms at the highest levels.

renewable

nonrenewable

Renewable  

topsoil

magnification

Water pollution can come from many sources. Point-source pollution comes from large farms, factories, septic systems, sanitation systems, and landfills. Nonpoint pollution sources include cities, abandoned mining sites, and animal waste.

Greenhouse gases absorb energy from the sun. The gases hold onto this heat and trap it in the atmosphere instead of allowing it to be reflected into space. The increased temperature from the gases in the atmosphere is a major factor in climate change.

Explanation:

answer; i believe that the correct answer is (lung);

organ system-an organ system is a group of organs that work together to perform one or more functions. each does a particular job in the body, and is made up of certain tissues.