What is a case of an environmental effect changing a phenotype?

Caterpillars in cocoons under different colors of light develop different-colored wings.
Caterpillars that receive two recessive traits from parents develop no wings as a defect.
Caterpillars with both parents having red wings develop red wings.
Caterpillars with a parent with red wings and another with blue wings develop purple wings.
is it A

5 answers

Right! It is the only choice involving an environmental factor.
psy ur not helpful
coolboy who tf asked
coolboy actually says you.
man yall are rude but yes its a