An aging population, a high infertility, and a lack of food and water.
Answer:

Well, you can take the example of different genres of music. One person might like pop while others might be more interested in country, jazz, hip hop etc. So, what seems good for one might not seem good for others due to their tastes in different things.

Answer: D. All of the above are associated with the reproductive system.
why:
seminal vesicles: organ that helps produce semen
fallopian tubes & ovaries: organs in female
reproductive system that produce eggs
the production of gametes & sex hormones: this occurs in reproductive system. gametes = eggs + sperm