Imagine that you are designing a self-sustaining habitat spacecraft. What you have to include in the spacecraft to create an ecosystem?

nice air, plants and animals

Explanation:

you need to keep everything safe so it won't die over

answer; i believe its (ovulation);

the corpus luteum secretes estrogens and progesterone. the latter hormone causes changes in the uterus that make it more suitable for implantation of the fertilized ovum and the nourishment of the embryo. if the egg is not fertilized, the corpus luteum becomes inactive after 10–14 days, and menstruation occurs.

i hope this : )