This is an example of Positive reinforcement.
Positive reinforcement is the addition of a reinforcing stimulus (giving the dog a treat) following a behavior (rolling over), that makes it more likely that the behavior occurs again.
The correct answer is - a) slump.
The slump is a geological occurrence that happens when a larger consolidated mass, usually composed of rocks, moves down, or falls down, a steep slope as one large mass. The movement or falling of the material is relatively short, and it can be only few ten meters, or few hundred meters. The slumps occur suddenly, usually without any warning sign, apart from the loud cracking noise few seconds before the material moves or falls down.
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Sedentary means you stay in one place and aren't very active. Nomadic means that you travel around a lot.
If there are a lot of available resources, the tribe will want to stay because having resources nearby will help them survive much easier. This would make them sedentary.
If there are scarce resources nearby, they will go away and look for more abundant resources, making them more nomadic.
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Unlike latitude lines<span>, </span>longitude lines<span> are not parallel. Meridians meet at the poles and are </span>widest<span> apart at the equator. Zero degrees </span>longitude<span> (0°) is called the prime meridian. The degrees of </span>longitude<span> run 180° east and 180° west from the prime meridian.</span>
