Which factor allows earth to hold onto liquid water
a. presence of living things
b. lunar tides
c. moderate temperatures
d. lack of gravity

Where does oxidative phosphorylation take place

What's erosion? a. the breakdown of rock into smaller pieces b. the removal of weathered products from rock c. a change in rock resulting from exposure to water d. a chemical change in rock that weakens it

Can someone me choose a broad topic and area of focus i am really doing this as a tally to see which one most people pick ok water pollution global warming endangered species atmosphere for the !