Colour of eyes, facial features, etc., are usually influenced by –

Correct option is B

Heredity primarily influences traits such as eye color, facial features, and other physical attributes. These characteristics are determined by genetic information passed from parents to offspring.
Information Booster: Heredity involves the transmission of genetic material (DNA) through chromosomes, which encode traits. Traits like eye color result from dominant and recessive genes.
Additional Knowledge:
· Environment (a): Impacts behavior and secondary traits but not fixed genetic traits.
· Maturation (c): Refers to the biological growth process, not the origin of traits.
· Development (d): Involves physical, cognitive, and emotional growth, influenced by heredity and environment.