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-> 3 abiotic non living

abiotic means "not alive". Examples include things like pH, temperature, oxygen concentration, sunlight, climate, precipitation (rain, snow), water, and types of soil.

-> Biotic factors are living or once-living organisms in the ecosystem. These are obtained from the biosphere and are capable of reproduction. Examples of biotic factors are animals, birds, plants, fungi, and other similar organisms. All living things — autotrophs and heterotrophs — plants, animals, fungi, bacteria.

Explanation:

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a. by using fur or clothes to trap heat energy near the body

i think the answer would be d