Question

We cook our food ourselves. Does it means that humans are also autotrophs?

Answer 1

Autotrophs are generally referred to those who can synthesis their own food by themselves eg green plants.They only require sun's energy water and minerals to complete their photosynthesis.
But we human beings who are known are heterotrophs cook the eatables which we obtain from autotrophs or other heterotrophs.
If we stand under the sun our stomach does not get filled with food like in plants.
This is because plants contain chlorophyll but we know we don't.Hence going and cooking in the kitchen is an artificial way which does not make us autotrophs.

Answer 2

We cook our food but we are not autotrophs as autotrophs are those living organisms which produce their food.

But we take stuff from nature like vegetables, fruits, cereals, so we depend on plants mainly. Autotrophic organisms can make their own organic nutrients by using the process of photosynthesis.

Hence, we are heterotrophs like other animals whereas plants are autotrophs as they produce their food with the help of sunlight and chlorophyll.