External stimulus. The rain is something out of your control while you're waiting. Rain is not something you are doing nor is it a response to you waiting for the bus.
No they cant be mechanical because then something would have to generate their rays through the inventing of a machine.
Answer:
Floriculture is an international, multi-billion dollar industry that includes the production of bedding and garden plants, foliage plants, potted flowering plants, cut flowers, cut cultivated greens, and floriculture materials.
Explanation:
Answer:
itis responsible for the circulation as wel as purification of blood in the human body
The body structure ( ovaries, testes, and external genitalia) that make sexual reproduction possible. Secondary spermatocytes
