Question

farmers sprayed litchi trees to suppress populations of scale insects. however, the spray also killed populations of a predatory lacewing that controlled the scales. soon the spraying did no good, and the damage to the leechi from the scales was greater than before spraying had occurred. few predatory lacewings exist in the trees now because
multiple choice
they, too, are insects so they are r - selected
the predator was r - selected and was therefore more susceptible to the spray
the scale insect was k - selected and the high number of young included a resistant strain, while the predator was r - selected and will take longer to produce a resistant variety.
the scale insect was r - selected and the high number of young included a resistant strain, the predator was k - selected and will take longer to produce a resistant variety

Explanation:

r - selected species produce many offspring quickly and have shorter - lived generations. K - selected species have fewer offspring and longer - lived generations. Scale insects, as r - selected species, likely had a resistant strain among their large number of young. The lacewing predators, being K - selected, take longer to produce a resistant variety, so they were more affected by the spray.

Answer:

the scale insect was r - selected and the high number of young included a resistant strain, the predator was K - selected and will take longer to produce a resistant variety