Earth's orbit and climate change
D. Chromosomes
DNA in the nucleus is found in structures called chromosomes.
The answer would be all of the above.
Species is a type or kind of thing while ecomorph is a local variety of a species whose appearance is determined by it's ecological environment
Id say that the best answer is Loess. I say that cause loess means a loosely compacted yellowish-gray deposit of windblown sediment of which extensive deposits occur.
Hoped this helped ;)
