Heredity refers to all those traits which a child acquires from:

The correct answer is Parents. Heredity is the process by which genetic information and traits are passed down from parents to their offspring.

• Parents: Children inherit a combination of genes from both their biological mother and father, which determine a wide range of characteristics, including physical attributes, predispositions to certain diseases, and aspects of temperament.

'Environment' refers to external factors that influence development, not inherited traits. 'Sperms' are a component of heredity from the father, but heredity encompasses contributions from both parents (egg and sperm). 'Alam' is not a relevant biological term in this context. Therefore, 'Parents' is the most comprehensive and accurate answer for the source of inherited traits.