I try to study but i just cant seem to focus. pls help

Which of the activities listed below could limit global warming by slowing the increase in atmospheric carbon dioxide levels? view available hint(s) select all that apply. a. replacing fossil fuels with nuclear energy b. burning vegetation to clear land for agriculture c. limiting soil erosion so organic matter takes longer to decompose d. choosing a fuel-efficient car, or bicycling to school or work e. using more electrical appliances and cars f. cutting down forests to build houses

Which theory suggested that the earth was once a signle supercontient that gradually that broke up into the contients that we know today

5. what is a red giant? can our sun become a red giant? why or why not?