Can some one please help

Will have the greatest effect on human health. pollution in the a. troposphere b. stratosphere mesosphere d. thermosphere

On the map above, areas along the coast are colored green (letter b). what type of climate do these areas have? a. arid b. semiarid c. mediterranean d. humid subtropical

June 19 is often a holiday in texas. it is emancipation day. what important event happened on emancipation day? a) it marks the end of slavery in texas. b) it marks end of the texas revolution. c) it marks the day texas became a state. d) it marks the last battle of the texas revolution.