A non-living part of an ecosystem that shapes its environment. Abiotic factors B Biotic factors Plants D Animals

## Step 1
The question is asking for the non-living part of an ecosystem that shapes its environment. In an ecosystem, there are two main types of factors: abiotic and biotic.

## Step 2
Abiotic factors are the non-living parts of an ecosystem that can affect living organisms and the functioning of ecosystems. They include physical and chemical elements such as sunlight, temperature, wind, water, soil, and atmospheric gases.

## Step 3
Biotic factors, on the other hand, are the living components of an ecosystem. They include plants, animals, and microorganisms.

## Step 4
Given the options, the correct answer is "Abiotic factors" because they are the non-living parts of an ecosystem that shape its environment.