Which of the following poses the greatest risk for species extinction?
a.
expansion of human cities
b.
increased levels of pollution
c.
intense hurricane activity
d.
uv radiation and the hole in the ozone layer

expansions of human cities because it happens directly takes away where they live. pollution is a negative but not as life threatening. Hurricanes dont happens over and over again in the same area in a small period of time unlike human expansion and the uv radiation is affect us humans too.

hello there,

igneous rock formed from below the surface would have more crystals because

answer: because magma cools more slowly than lava

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.