Here's why:

* Biotic factors are living things or the products of living things. They interact with other living organisms in an ecosystem. Examples include plants, animals, fungi, bacteria.

* Abiotic factors are non-living components of the environment. They are not derived from living things. Examples include temperature, sunlight, water, soil.

Once an organism dies, it ceases to perform the functions of life (like metabolism, reproduction, growth). It no longer interacts with the ecosystem in the same way a living organism does. Therefore, a dead organism becomes part of the non-living environment, making it an abiotic factor.

However, a dead organism can still play a role in the ecosystem. For example, decomposers (like bacteria and fungi) break down dead organisms, returning nutrients to the soil. This is an important process in the cycle of life.