Concept:An endowment policy is a type of life assurance contract that pays a lump sum on maturity or earlier death.Explanation:Endowment policies combine saving with life cover.The policyholder receives a guaranteed sum after a fixed term if they are still alive.If the policyholder dies before the term ends, the beneficiaries are paid the sum assured.This protection is based on human life, so it falls under life assurance.Answer:D. life assurance policy