Which is biotic?
a. wind
b. iron gate
c. sunlight
d. dead leaf

The correct answer is a dead leaf.

Biotic factors are the living organism that made up the ecosystem. The biotic components in an ecosystem include microorganisms, plants, and animals.

Also, the ecosystem is made of abiotic components such as temperature, sunlight, chemicals in the soil and clouds.

Humans and microorganisms, including all living organisms, are regarded as biotic factors.  

However, there 3 main categories of biotic factors and these include:

Autotrophs are producers, Examples of organisms that are classified as Autotrophs are algae and most green plant. They can produce their product through a process known as photosynthesis.

Heterotrophs are consumers, examples of organisms that are classified as heterotrophs in the ecosystem include, bacteria, fungi, herbivores (cow, sheep), and omnivores (humans, rats, birds, etc). The heterotrophs made up approximately 95% of the living organism within the ecosystem.

Detritivores are also classified as consumers, but they categorized differently because of what they eat. Within the ecosystem, the Detritivores are also known as decomposers because they feed on dead organisms. Examples of organisms that feed on dead organisms include earthworm, millipedes, sea stars and many more.

However, the three categories of abiotic or non-living factors in the ecosystem include:

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examples of nucleic acids are deoxyribonucleic acid (dna) and ribonucleic acid (rna).

correct answer: false

while planning water activities, it is very important to consider the weather, because if we do not plan and are going for a surf, then it might be that the hurricane came and drown us or may carry us to long distance from where we can not come back. there are many reasons to take information about the weather when we are planning any water activities.

hence, the correct answer would be false.