Why does a cell of a growing multicellular organism need to divide with regards
to getting its necessary substances it
needs to survive?

A. If a cell gets too large, it will not get the
substances it needs due to diffusion
occurring a lot slower.
B. If a cell gets too large, it will get all the
substances it requires and thus large size is
equal to receiving enough substances it
requires
C. If a cell gets too small, there is not enough
space to fit all the substances it needs to
survive.
D. If a cell gets too small, it will not get enough
substances to support its life.

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.

answer >   yes we do, women; have three holes, urethral opening(pee hole, vagina, and the women pee/girls pee out of the urethra like the men do; only they have a single opening to pee/ejaculate.   (sorry if i'm too forward with this, but this is for a biology class, isn't it? )

hope that !         : )