What are all of the living and nonliving things in an area called?

The living parts of an ecosystem is called biotic factors, the nonliving parts are called abiotic factors.

Ithink it’s carbon dioxide

The question is incomplete. complete question is attached belowanswer: correct answer is option b  i.e.  solid particles  reason: filter paper has small pores, through which smaller particles can pass through. however, solid particles  have relatively larger size. hence, they are least likely to pass through.