The biotic environment refers to all living organisms and their interactions within an ecosystem. It consists of several major components.

Option 1: Plants are an essential component of the biotic environment as they are primary producers and play a crucial role in capturing energy from the sun through photosynthesis.

Option 2: Animals are also an important component of the biotic environment. They interact with plants, other animals, and their surroundings, playing roles such as consumers, decomposers, and pollinators.

Option 3: Decomposers are organisms responsible for breaking down dead organic matter and recycling nutrients back into the ecosystem. They play a vital role in the biotic environment`s nutrient cycling processes.

Option 4: Water is not a major component of the biotic environment. While water is an essential resource for all living organisms, it falls under the abiotic (non-living) component of the environment.

Overall, option 4 (Water) is the correct answer as it does not belong to the biotic environment. Alert - Correct answer should be option 4 (Abiotic factors such as temperature, sunlight, soil, and air should be the correct answer as they are the major non-living components of the environment).