Develop when two eggs each get fertilized by two different sperm, resulting in two zygotes in the uterus at the same time.

It is called dizygotic twins. In light of their being two separate zygotes, the hereditary cosmetics of dyzygotic twins is unique, and hence they are not indistinguishable. By and large, these twins will share half of their qualities, much the same as some other match of kin. Besides, they might be a similar sex or be a male and female combine. 

Its either a) or b),wind and water erosion gradually widen the canyon

Ifound this information on google “yes. they have a mouth and brain at one end and an anus at the opposite end. what characteristics distinguish an annelid from other worms? annelids have segmented bodies and a coelem which is a tube filled with fluid and contains most of the organs.“ i hope it you