Final answer:
Germination is the process in which the embryo in a seed starts to grow again. It involves the emergence of the root, elongation of the hypocotyl, and expansion of the cotyledon.
Step-by-step explanation:
The process in which the embryo in a seed starts to grow again is called germination. Seed germination is the transition of an embryo into a complete plant. It involves the emergence of the root, elongation of the hypocotyl, and expansion of the cotyledon. During germination, the stored food in the seed nourishes the growing embryo, enabling it to develop.