(08.01 MC) Which of the following is not a reactant in the reaction creating ozone in the troposphere?

Sunlight
Nitrogen oxides
Sulfur dioxide
Volatile organic compounds

The biome pictured above is found in areas such as kenya and south africa. the land is grass-covered with very few trees and gazelles and other grazers are common here. why does this biome have a low population of trees? a) large grazing animals destroy the trees. b) it is a deforested rainforest with poor soil. c) it has high temperatures and low precipitation. d) it has a long rainy season followed by flooding.