Which list contains only abiotic factors a. a water temp, amount of sunlight, and soil type b. density of predators, water depth, and types of parasites c. participation amount, number of prey species, and plant types d. variety of food sources, annual precipitation, and number of decomposes

The correct option is A.
There are two major components in every ecosystem, these are biotic and abiotic group. Biotic components refers to all the living components of the biosphere, these include the animals, plants and all other things that are made up of cells. The abiotic components of the ecosystem refers to the non living part of the ecosystem such as sunlight, water, temperature, relative humidity, etc.