The primary function of a lymphocyte is A. to phagocytize old and damaged cells B. to fight against foreign antigens C. to help from blood clots D. to help dissolve blood clots E. to produce histamines

to fight against foreign antigens

Explanation: lymphocytes is a type of white blood cell that helps fight against invaders or foreign body in our body system. They are found mostly on the lymph and blood

There are basically two types of lymphocytes;

T lymphocytes- It develops from the thymus and Its functions by identifying intruders and then respond by eliminating them.

B cell or lymphocytes develop from the bone marrow hence the name B cell. It functions by creating some antibodies that destroy the effect of invaders that causes adverse effect.

condensation. good luck!

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.