6. Muchos animales del desierto dependen del nopal. Obtiene energia de productores.
Regresa nutrientes al suelo.
Se alimenta de otros organismos
Provee energia a los consumidores.
¿Qué función tiene el nopal en una red alimenticia del desierto?

imagine a line passing through the center of earth that goes through both the north pole and the south pole. this imaginary line is called an axis. earth spins around its axis, just as a top spins around its spindle. this spinning movement is called earth's rotation. at the same time that the earth spins on its axis, it also orbits, or revolves around the sun. this movement is called revolution.

all these collisions do one thing, and that thing is explained in the last option. when dusst, rocks and ice collide, they harden and form giant layers of rocks or hard ice.

d)   to harden materials to form different parts of earth’s layers

hope it ,

bioteacher101