Question

46 essay 2 points explain how biological insect control kills only the target insects while chemical insecticides kill many different kinds of animals. 47 essay 2 points describe the relationship between urbanization and the urban crisis.

Explanation:

Sub - question 46

Biological insect control uses natural enemies like predators, parasites, or pathogens specific to the target insects. These have evolved to interact only with the target species. Chemical insecticides, on the other hand, are broad - spectrum poisons that affect any organism with a similar physiological response mechanism, thus killing many different kinds of animals.

Urbanization is the process of population movement from rural to urban areas, leading to growth of cities. Urban crisis can occur due to rapid urbanization overwhelming city infrastructure, causing problems like housing shortages, traffic congestion, pollution, and social unrest. Also, uneven urbanization can lead to disparities between different parts of a city, contributing to the urban crisis.

Answer:

Biological insect control uses natural enemies specific to target insects. Chemical insecticides are broad - spectrum poisons affecting multiple organisms.

Sub - question 47