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1. Biotic factors refers to the living components of an ecosystem. They are divided into three different classes, which are: producers, consumers and the decomposers. The producers are the plants in the ecosystem that produces their own food via photosynthesis. The consumers are the animals in the ecosystem, which can not produce their own food but depend on the food produced by plants and eating of other animals for sustenance. The decomposers are the organisms that feed on the dead organic matters in the ecosystem.
2. Abiotic factors are the non living components of an ecosystem. Everything in an ecosystem, that is non living fall under this category. Abiotic factors are usually divided into three classes, which are: climatic, edaphic and social abiotic factors. Examples of climatic abiotic factors are: relative humidity, rainfall, temperature, wind, etc. Examples of edaphic abiotic factors are:soil type, minerals, rocks, etc. Social abiotic factors refers to those actions by humans and animals which disrupt the ecosystem. Examples of social abiotic factors are: plants destruction, fire outbreak, construction of buildings, etc.
3. The biotic and the abiotic factors in the ecosystem interact with one another in order to sustain the ecosystem. For instance, for a plant [which is a biotic component of an ecosystem] to grow, it needs sunshine, water, good soil, etc, which are abiotic factors. Thus, the biotic and the abiotic factors work together in an ecosystem to make things happen.