Which action is designed to increase the safety of a person carrying a microscope from one place to another? putting a cover over the microscope
setting the microscope to the high-power objective position
wrapping the electrical cord around the arm of the microscope
raising the stage of the microscope until it touches the objective

wrapping the electrical cord around the microscope

Explanation:

i took the test

it is C

Explanation:

Because I took test and guy above me said

amber has allowed scientists to study dna that has been preserved over millions of years.

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.