I belive the correct answer is D
Hope this helps :)
Idk the options but it could be genetic variation
The rift<span> is a narrow </span>zone<span> that is a developing divergent tectonic plate boundary, in which the </span>African<span> Plate is in the process of splitting into two tectonic plates, called the Somali Plate and the Nubian Plate, at a rate of 6–7 mm annually.</span>
Polar because it always is below 32 degrees and has no rainfall