Which of the following statements best describes the role of hormones in the body?
a) hormones send chemical signals throughout the body to regulate other body processes.
b) hormones are chemical signals that are sent throughout the body to regulate other body processes.
c) hormones send electrical signals throughout the body to regulate other body to regulate other body processes
d) hormones are electrical signals that are sent throughout the body to regulate other body processes.

B. Hormones are chemical signals...

Option B

Explanation:

Hormones are chemical messengers that are sent throughout the body to regulate the other processes of the body. These signals flows through the bloodstream and reach the body parts where it has to work.

The body functions such as reproduction, digestion, sexual behavior and various cycles of body is controlled by hormones.

Example: serotonin, epinephrine, insulin et cetera.

Thus, the correct answer option B.

do you have a picture?

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.