Name three animals on land that lay eggs, no reptiles or birds can be named.

Many people may not know it, but the Australian Platypus is a mammal that can actually LAY eggs!

There is also Monotremes, who are also mammals, lay eggs and feed their young on milk.

Finally, the Echidna is a mammal who lays eggs, sort of like a bird, but isn't!

(All these animals feed their young on milk, not just the Monotremes!)

Interesting, right?

↑   ↑   ↑  Hope this helps! :D

answer:

convection currents in the magma drive plate tectonics. heat generated from the radioactive decay of elements deep in the interior of the earth creates magma (molten rock) in the aesthenosphere. the aesthenosphere (70 ~ 250 km) is part of the mantle, the middle sphere of the earth that extends to 2900 km.