I pretty sure that it include both biotic and abiotic. But "C" is wrong. Now your answers are between "A,B and C"
Refuted. This happens, as explained in the question , when the result does not support the hypothesis.
I am most likely sure that it is true
As food passes through the GI tract, it mixes with digestive juices, causing large molecules of food to break down into smaller molecules. The body then absorbs these smaller molecules through the walls of the small intestine into the bloodstream, which delivers them to the rest of the body.
D. ice core samples for the arctic and anarctic