Which is an autotroph?
question 4 options:

alga

mushroom

sparrow

wolf

alga

Explanation:

An autotroph is an organism that able to produces food (organic compounds) for itself using the light energy or inorganic chemical reactions. Autotroph is always considered as primary producer in a food chain. Example of autotroph includes plants and alga.

In more details, algae can produce energy food for themselves using sunlight, carbon dioxide, water, chlorophy and oxygen.

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genetic variation can be caused by mutation (which can create entirely new alleles in a population), random mating, random fertilization, and recombination between homologous chromosomes during meiosis (which reshuffles alleles within an organism's offspring).