Why is it important to preserve fossils?

Fossils are used to determine how many meteors hit Earth.
Fossils are used to determine future climate.
Fossils provide evidence of the conditions of Earth a long time ago.
Fossils are used to help determine the age of the Sun.

Fossils provide evidence of the conditions of Earth a long time ago.

Explanation:

A fossil is defined as "the remains or impression of a prehistoric organism preserved in petrified form or as a mold or cast in rock." The remains of a prehistoric organism can provide evidence of conditions on Earth from a long time ago.

c is the answer : )               your welcome

c. earths continental crust is thicker than its lithosphere.

because, the lithosphere is the outermost layer of the earth/ 100 km thick and is defined by its machanical properties.the lithosphere contains oceanic and continental crust that varies in age and thickness across locations and geologic time. the lithosphere is the coolest layer of the earth in terms of temperature. the term lithosphere should not be confused with the use of "geosphere" which is used to indicate all of earth systems, including the atmosphere, hydrosphere   and biosphere. the surface of the earth can be divided into the continental crust and the oceanic crust.   the continental crust is made mostly of granite while the oceanic crust is made of basalt. the average thickness of the continental crust is 25 miles and the average thickness of the oceanic crust is 5 miles.   three types of rock, igneous, sedimentary, and metamorphic, make up the surface of the earth. that's why 3 option is preferable.