Why and where is DDT still being used? a. to prevent the spread of malaria in tropical areas
b. to stop pests—both insects and weeds
c. when poor countries can afford to purchase it
d. when other pesticides don't work

A. to prevent the spread of malaria in tropical areas

Explanation:

(DDT) is an insecticide used in agriculture. The United States banned the use of DDT in 1972, but some countries still use the chemical. DDT has also been used in the past for the treatment of lice. It is still in use outside the United States for the control of mosquitoes that spread malaria. DDT and its related chemicals persist for a long time in the environment and in animal tissues.

evertheless he ought to be slow to believe and to act, nor should he himself show fear, but proceed in a temperate manner with prudence and humanity, so that too much confidence may not make him incautious and too much distrust render him intolerable.

explanation: