Question

Why all animals and humans are herotrophs

Answer 1

Because we lack photosynthetic or METHANOGENIC cells to make the organic food source by using inorganic raw materials
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Answer 2

first it "HETEROTROPH" not "HEROTROPHS".

Explanation:

if you are a biology student ,then you well know that humans are included in the animal's kingdom .

so let's talk why are they heterotrophs,

you have to recall the definition of heterotrophs ,

heterotrophs are those ,which do not synthesize or prepare their own food and they depend own autotrophs for their food.they are second and tertiary consumers.

so that s the reason ,why animals and humans are heterotrophs because they do not prepare their own food and depend on others