The "soil type" is an example of abiotic factor to an earthworm. Abiotic factors are the non-living factors which influence the earthworm present in soil. Thus, the correct option is A.
<h3>What is Abiotic factor?</h3>
Abiotic factors are the non-living components of the environment that affect living organisms and the functioning of the ecosystems as a whole.
Soil type is an abiotic factor for the earthworm present in it. The soil helps an earthworm to collect food and hence in increasing its population. Soil is made up of the rocks, minerals and other non-living particles.
Therefore, the correct option is A.
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