The lower mantle is composed of magnesium, iron-bearing silicates, olvine, and pyroxene.
Explanation:
The answer is A, Buddisum
Answer:
1) if mother nature pressures a species to evolve they will not evolve right therefore they past on to their offspring and the they die.
2)mass extinction occurs when something BIG happens take dinosaures for ex they were wiped out by something HUGE this was all proving by sci because of the fossils
3) the meteor (i think)
4) i don't know
Explanation:
sorry if I am wrong for any of these
have a nice day
Answer:
I don't know spanish but if you know english I could help
Explanation:
Im pretty sure its the NCR ( Nuclear Regulatory Commission ) <span />
