The excretions of living organisms are best categorized as which type of factor in an environment? biotic abiotic living nonliving

Wats iqpow pls write 20 words for an answer

Two technicians are discussing how to test a car's exhaust by holding a small piece of paper within an inch of the tailpipe mouth. technician a says that if the paper is vibrating due to a "puffing" output from the tailpipe, this signals a smoothly running engine. technician b says that if the paper is being drawn toward the tailpipe, this could indicate burned exhaust valves. who is correct? a. technician b b. both technicians a and b c. technician a d. neither technicians a or b

Break down of rocks and minerals into smaller particles without a change in composition is called_