According to the principle of intrinsic fitness (the representation of your genes in your relatives), which of the following strategies best suits a young bird?
a. go on his own, find a mate and try to raise at most one chick each year
b. stay with the parents for one year and them raise two additional chicks, then go find a mate for the second year when he can raise two chicks on his own.
c. stay with the parents for 2 years and them raise two additional chicks each year

Option A

Explanation:

As per the principle of intrinsic fitness, a person likes to work for his/her inner satisfaction driven by motivation within him/herself.

Thus, a young bird which feels an urge to produce chicks by mating each year will ultimately go outside to find his/her mate on their own and will produce chick every year. In an intrinsic behaviour the rewards achieved are internally self satisfying and thus a person need no assistance in achieving them on their own.

Thus, option A is correct.

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.