What is the answer to number 1 on social studies weekly on the crossword puzzle on number one

i believe

clean air is essential for health and survival

clean air provides nitrogen gas for plant respiration

clean air supplies oxygen that enables living organisms to breathe

hope this

i am brianly

sorry if this doesn't

the template that is used is page layout then the margins option and finally choose the normal option.

answer; being clearly political;

answer; use multiple stimuli;