Answer: A large body of water that is partially surrounded by land.
Explanation:
At first you have to write the variables out which are

now you have to combine like terms


now you add these two variables and end up with answer of
The moving of continents is called continental drift. The average speed of the movement of these continents are 2.5 inches per year. Examples would be t<span>he North American and Eurasian tectonic plates which are separated by the </span>Mid-Atlantic Ridge<span>. The two continents are moving away from each other at the rate of about 2.5 centimeters (1 inch) per year. </span>