hey could someone help me with this immediately! i’ll mark brainiest if u don’t guess or leave a link!! (and there’s actually four options and the last one 100 degrees C. i couldn’t fit that answer tho)

Which would best keep the oxygen cycle stable? a. cutting down jungles to create farmland b. eliminating parks in large cities c. dumping toxic chemicals into the ocean d. reducing the amount of deforestation d. reducing the amount of deforestation

What causes darkening of the skin as melanin production increases

In this experiment, the was intentionally manipulated. it is the independent variable. the dependent variables that were measured were the