Which statement is true concerning the planets’ orbits?

all planetary orbits are identical in size.
all planets revolve around the sun at the same speed.
all planetary orbits are elliptical.
some planetary orbits are irregular in shape.

What evidence supports geological processes changing the surface of the earth? cutting down forests creates a decrease of habitats. tectonic plates uplift the rocky crust of earth to form mountains. competition in ecosystems creates a decrease in diversity. pollution runoff contaminates a lake.