Answer :
The reason they don't need light right away is because of option A. The cotyledon provides the nutrients and energy the plant needs to start.
Reason for don't need light:
Since many seeds should be germinated and begin to grow in the dark so here the cotyledon gives the nutrients and energy the plants required to begin growing.
hence, the option a is correct.
Therefore, the rest of the options are wrong.
Learn more about seeds here: https://brainly.com/app/ask?q=seeds