When people are in a group situation in which they feel deindividuated, they are most likely to behave badly when

Accountability is the key factor that drives the negative outcomes associated with deindividuation.  When people are in a group situation in which they feel deindividuated, they are most likely to behave badly when they feel anonymous to outsiders who may be watching them.

careless

Explanation:

the correct answer is 2.

a slump in geology means a mass movement process of slope failure. a mass of rock or unconsolidated material drops along a slip surface. in other words, rock layers move a short distance down the slope. the slump block is an intact block (2), without any landslide material.

in this image, 1 is the surface of rapture (scarp), 2 the slump block, 3 main scarp (crown), 4 base of rapture with debris flow.

slumps are caused by clear cutting on unstable soils and the sagging of earth, in coastal areas they are due to wave infiltration.