Which of the following is a biotic factor in an ecosystem?

a.trees
b.wind
c.Precipitation amount
d.sun light

http://en.wikipedia.org/wiki/Biotic_component

I'll be glad to check your answer.

wind

To determine which of the options is a biotic factor in an ecosystem, let's first understand what biotic factors are. Biotic factors are living components of an ecosystem that directly or indirectly influence other organisms within that ecosystem.

Now, let's analyze each option:

a. Trees: Trees are living organisms, so they interact with other organisms in the ecosystem, such as animals that use them for shelter or obtain food from them. Therefore, trees are considered biotic factors.

b. Wind: Wind is a non-living, physical component of the environment. Non-living factors that impact an ecosystem are called abiotic factors, not biotic factors. Therefore, wind is an example of an abiotic factor.

c. Precipitation amount: Precipitation, such as rain or snowfall, is an abiotic factor. It is not a living organism and does not have biological interactions with other organisms. Therefore, precipitation amount is not a biotic factor.

d. Sunlight: Although sunlight is not a living organism, it plays a crucial role in the survival and growth of most organisms. Plants, for instance, rely on sunlight for photosynthesis. Sunlight is considered a biotic factor because it directly affects living organisms within an ecosystem.

Therefore, the correct answer is:

a. Trees