If traveling to the center of the earth in a car, what would you see of the layers of the earth

The first layer (crust) is rock

The second layer (Mantel) Is molten rock

The third layer (outer core) is liquid iron and nickel

The fourth layer (inner core) is solid iron and nickel

Hope this helps :)

not necessarily. higher fitness requires the organism to be reproductive successful. for example, an organism at age 10 with 15 offspring is much more fit than an organism at age 15 with only 5 offspring.