Sand or gravel that naturally forms near earth's surface is known as
a. aggregate.
b. ore.
c. pollen.
d. bedrock

Sand or gravel that naturally forms near the Earth's surface is known as aggregate. Option "A" is the correct option among all the options given in the question. Practically aggregate has several type of meanings. In respect to the question given the meaning of aggregate is the combination of several items that are together known as aggregate.