Pls answer this What is the main negative effect of slash and burn deforestation in rainforests?

A. Bare land warms absorbs heat and warms the surrounding air faster than forested areas.

B. The erosion of thin, fragile tropical topsoils

C. Heavy smoke in the air causes respiration problems for humans

D. A rapid increase of carbon dioxide, faster than photosynthesis can remove the CO₂

Researchers want to use edna to look for an invasive species in the water which of the steps would be likely do last

Aboy jumps into a cold swimming pool and his body tempature goes down hus muscles ,blood vessels

Two students are working together on an experiment that measures the effect of different liquid fertilizers on the thickness of plants’ stems. which is most likely to result in the greatest amount of error in their scientific experiment? a. one student measures the plant stem widths by using calipers. the other student measures the widths of the same plant stems again by using a different pair of calipers. b. one student measures the plant stem widths by using calipers. the other student types the measurements as they are taken into a computer spreadsheet. c. one student weighs liquids for the experiment by using a calibrated scale. the other student weighs liquids for the experiment by using a different calibrated scale.