Ddt was once considered a ‘silver bullet’ that would permanently eradicate insect pests. today, instead, ddt is largely useless against many insects. which of these would have been required for this pest eradication effort to be successful in the long run?

None of the individual insects should have possessed genomes that made them resistant to DDT.

Explanation:

Pesticides such as DDT have been considered one of the best way to kill insects in the past. But with time, farmers have observed that this is not an authentic method. This is because the insects can gain resistance to the pests if they are exposed to the pesticide again and again. Even they could transmit these resistant genes in their offsprings. Hence, DDT will become useless against insects over time.  

answer; the population in brazil is very diverse there are many races and ethnic groups

the answer is a quran