Which of the following includes a plant embryo, a food supply, and a protective covering?
a. pollen grain
b. spore
c. seed
d. gametophyte

C. seed

Explanation:

A seed is a precursor of new plant growth as it enclosed in itself the plant embryo after the process of fertilization of the male gamete pollen with the female gamete egg. The formation of seed is a characteristic feature of spermatophytes like gymnosperms and angiosperms. A seed typically composed of necessary nutrients which will sustain the young embryo and helps in the germination process. The hard protective coating prevents the loss of water from the seed so as to sustain the young embryo until it get germinated.

they absorb it i think

not sure

you

the principles and empirical processes of discovery and demonstration considered characteristic of or necessary for scientific investigation, generally involving the observation of phenomena, the formulation of a hypothesis concerning the phenomena, experimentation to test the hypothesis, and development of a conclusion that confirms, rejects, or modifies the hypothesis.