How much sunlight does the twilight zone get? none at all almost as much as the sunlight zone a lot in the summer but none in the winter the small amount that penetrates the sunlight zone

The area between 200 and 1,000 meters (656 and 3,280 feet) is the mesopelagic or “twilight” zone.

Explanation:

Light intensity in this zone is severely reduced with increasing depth, so light penetration is minimal. About 20 percent of primary production from the surface falls down to the mesopelagic zone.

i believe it is "they are not used up by reactions" as the answer to your question, text me back if this is correct because i just learned this.

ans.

gregor john mendel is known for study of inheritance in pea plants. he used garden pea plant for his study, having alternative traits for various characters. he performed cross-breeding in pea plants to check how characters are transmitted between parents to offspring, such as cross between pure tall and pure dwarf plant. mendel studied the inheritance patterns in pea plants for various generations.

thus, the correct answer includes options and f).