I would say (D) Astronomy is the study of the sky and the mysterious objects in it.
Answer: Seed users are the most important stakeholders. They are the farmers who buy or trade for the seed, who accept or reject the new crop varieties, and who still manage the bulk of crop seed on their own farms. Many of the seed users are women, whose livelihoods can be enhanced through proper seed interventions.
4 problems is the right answer, hope this helps
That is a good thought in my opinion