The constraint or budget line, in the diagram below, represents the possible levels of consumption in the two periods given the individual's level of present income, future expected income and the prevailing interest rate 'r'.
Wasp, common name applied to most species of hymenopteran insects, except bees and ants. Insects known as wasps include the sawflies, the parasitic wasps, and the stinging wasps, which are the best known. About 75,000 species of wasps are known, most of them parasitic. Characteristics.
They are one of the major natural scavengers, and they eat insects such as flies and caterpillars that are often considered pests to humans. They should be left alone if they are in a location where they are not bothering people. Some wasps pollinate plants and crops, but most do not.