First will get brainliest what is the term for a large region of sand? a. erg b. loess c. lichen d. desert

ANSWER:

Erg is the term for a large region of sand.

EXPLANATION:

An erg is a large area of sand that has little or no vegetative cover at all. Sand covers more than '20%' of the area in an erg. Most of the sand is wind-blown and form small dune fields. Several ergs may be present in a desert which is an area that has large number of sand dunes. An erg is also called a 'sand sea' or a 'dune sea' and is usually a flat and broad area of a desert.

The investiture controversy began as a power struggle between pope gregory vii (1072–85) and henry iv, holy roman emperor (1056–1106).[2] a brief but significant struggle over investiture also occurred between henry i of england and pope paschal ii in the years 1103 to 1107, and the issue played a minor role in the struggles between church and state in france, as well.by undercutting the imperial power established by the salian emperors, the controversy led to nearly 50 years of civil war in germany, and the triumph of the great dukes and abbots. imperial power was finally re-established under the hohenstaufen dynasty. historian norman cantor: