Bioherms are made of
sand, silt, and clay
algae, corals, and shells
carbonic acid and limestone
layers of evaporated salt

How many countries have portuguese as a national language?

From the standpoint of geography, a is an internal rendering of an individual's known world

Describe the characteristics of the nile river and the river’s importance to the people of egypt. write a paragraph of at least 5 complete sentences.