Which of the following statements is true?
a.
igneous rocks form from the cooling and crystallization of magma.
b.
fossils are frequently found in metamorphic rock.
c.
sedimentary rocks are formed as a direct result of chemical weathering.
d.
extrusive igneous rocks, found in the earth's lithosphere, are not subject to weathering.

Igneous rocks form from the cooling and crystallization of magma.- A.

the major pests we deal with are insects, weeds and fungal diseases. a pesticide is a product, whether organic or chemical, used to kill the target pest. there are other techniques gardeners should use that can prevent the severe infestations that make the use of pesticides necessary

aquifers are bounded above and below by impermeable rock. the driving force of groundwater movement in confined aquifers is pressure, rather than gravity.