Family planning is often

a.
expensive in some countries, even though it is inexpensive in others

b.
cost-effective as it saves more money than it costs

c.
relatively cost-ineffective as it costs little more than it saves

d.
prohibitively expensive

e.
cost-free

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.