Correct Answer !
Bedrock exposure used as protective cover for human occupation. Rockshelters are distinct from 'caves' in that the former do not have cavernous chambers and are typically limited to bedrock exposures with a slight overhang. Rockshelters served as important parts of prehistoric settlement systems in which open-air sites were inhabited by larger groups near perennial streams and rivers for longer time spans during warmer months, while rockshelters and other secluded sites were targeted by dispersed hunting and gathering groups during winter months or for specific activities during other times of the year. For an example of a rockshelter site, see "The Middle to Upper Paleolithic Transition: The Levant".