Question

multiple choice question
in response to hormonal signals, the angiosperm embryo and endosperm stop dividing, and the seed gradually loses moisture and
is grafted to a root
becomes dormant
germinates.
develops true leaves.

Explanation:

When the angiosperm embryo and endosperm stop dividing due to hormonal signals and the seed loses moisture, it enters a dormant state. Grafting is a horticultural technique not related to this process. Germination is the process of a seed starting to grow (opposite of what's described here as the seed is stopping active development). Developing true leaves occurs after germination. Dormancy is a period of suspended growth and development which fits the description of the seed's state here.

Answer:

becomes dormant