Did reptiles or amphibians occur first?

The geographic feature in the westernmost corner of kenya is answer: the great rift vally

Magma forms by partial melting of upper mantle and crust. partial melt means that only a fraction of the available material forms a melt, and that the remainder stays solid. the partial melt rises because of its lower density and ascends through he crust. this is so conclusive mean the answer would be magma igneous rocks or balistic magma.

the correct answer is "d.) all of the above."

(liquid water evaporates from lakes when heated by the sun.)

(frozen water sublimates from ice and snow.)

(liquid water is lost from tree leaves during evapotranspiration.)

Iam pretty sure that the answer is either a. -  it would the ecosystem become more stable. or it is d. -  the larger number of species would make the ecosystem more prone to disease.. 
i would go with d.
i hope this you!
have a nice day!