Will give brainliest : ) what is the function of our ecosystem? environmental issues: select the best answer from the choices provided. a. it shields the earth from the sun's uv rays. b. it breaks down and absorbs pollution. c. it increases oxygen in the atmosphere. d. it increases temperature in the summer and decreases temperature in the winter.

D.  It increases temperature in the summer and decreases temperature in the winter.

hope this helped

a historian researching the immigration policies of the early 1900s would expect a source written today,rather than in 1910 to :

( a ) be more interested in objective data and statistics.

my cultural heritage consists of irish, german, native american, and others.