Answer:
b. each has its own geologic history.
Explanation:
An ocean is a body of salt water which covers approximately 70% of the Earth's surface. About 97% of the Earth's water is comprised of ocean and as such it is the most prominent and defined feature of the Earth. There are basically four (4) categories of an oceanic basin and these are;
<em>1. The Pacific ocean. </em>
<em>2. The Artic ocean. </em>
<em>3. The Atlantic ocean. </em>
<em>4. The Indian ocean. </em>
On the other hand, Continents can be defined as very large landmasses or area of land typically surrounded and separated by water. It is divided into seven (7) main categories and these are;
<em>1. Africa. </em>
<em>2. Asia. </em>
<em>3. Antarctica. </em>
<em>4. South America. </em>
<em>5. North America. </em>
<em>6. Australia. </em>
<em>7. Europe. </em>
Continents differ in appearance from ocean basins because each has its own geologic history. Thus, a continent is less denser and comprise of a thick granite material while an oceanic basin is dense and an older basalt.
When a continent is compared with an oceanic crust, it was discovered that the continental crust is lighter in colour than the oceanic crust.
