This is for a timed test !

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 pattern of migration do whales follow?

Is a measure of the different types of organisms in a community. question options: tertiary secondary primary none of the above