Disposal of waste: This waste includes sewage, garbage and liquid waste from factories and homes. Wastages from chemical factories contain many toxic or poisonous chemicals. These are discharged into rivers. The river-water becomes poisonous for fish and other aquatic animals and plants.
Proximity. Proximity describes the tendency to perceive objects that are close to one another as being grouped together in a meaningful way. For example, you are likely to perceive no groupings in the following series of equally spaced squares:roximity. Proximity describes the tendency to perceive objects that are close to one another as being grouped together in a meaningful way. For example, you are likely to perceive no groupings in the following series of equally spaced squares:
For example, a plant needs sunlight to survive, or a human needs food and water to survive. In psychology, however, the concept of need assumes a slightly different definition. To psychologists, a need is a psychological feature that drives a human or animal toward a goal or behavior. Examples of this definition include a need for achievement, a need for affiliation with others and a need for attention. Let's move on to goals. Goal orientation theory is a social-cognitive theory of achievement motivation.