The answer would be D without reproduction there would be no offspring to carry on. It may not always include 2 organisms, some may be asexual, meaning they produce by themselves.
If I had to put my own opinion in this, I could say that it us true. Seeing how most changes to the earth are bringing strong winds and heat.
Alleles are versions of a gene that will express different qualities. Multiple alleles would mean that a gene has many variations; for example, there a multiple alleles for eye color: blue, green, brown, etc. The opposite would be a gene with just two variations; an example would be simple pea plants which can have smooth or wrinkled pods.
Hope this helps!!
