Josh and his family always rent a beach house for summer vacation. One
afternoon, Josh and his Dad took the
boat out and when they returned pulled
up their boat on the beach and went in
to have lunch. When they returned, the
beach was covered in water and the
boat was floating offshore. What is a
likely explanation?

The tide had probably rolled in and covered the beach with water and had swept the boat away offshore.

(I'm so sorry if this is wrong)

Hope this helps!

most community's take hundreds of years to become stable

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.