What are the two important parts of physical fitness program? a. skill-related and health-related b. physical-related and mental-related c. heart-related and skeletal-related d. cardio-related and strength-related

From the question, two important parts of physical fitness program are Physical-related and mental related.

Further Explanation:

Physical fitness is the ability of a person to successfully carry out or perform daily actions and activities with best possible performance, perseverance, fortitude, and strength in an effort to drastically reduce disease, stress and other human inactive behavior.  

There are various physical fitness programs which have been created by some individuals or group of individuals to help other persons with inadequate physical fitness; the major important parts of physical fitness program are:

Physical-related fitness is the act of engaging in regular and consistent exercise in order for an individual to have a good health. And health they say is wealth; physical related fitness further helps an individual in enjoying an improvement of health and fitness, leaving no room for poor health conditions.

Mental-related fitness can be referred to as the ability of a person to mentally exercise the brain in a bid to ensure the brain being in good form and shape. The importance of Mental-related fitness in an individual’s life should never be under-emphasized, as it yields great benefits in the life of an individual

It is important to note that physical and mental health goes side-by-side, and inadequate physical health can endanger an individual’s mental health. Inadequate mental health can absolutely reduce the overall condition of an individual’s physical. These two physical related fitness components are therefore essential for every individual

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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.