In an attempt to identify ecologically friendly methods for controlling mosquito populations, researchers conducted field experiments in a certain country where aquatic nymphs of the dragonfly brachytron pretense were used against the larvae of mosquitoes. the researchers concluded that brachytron pretense can be used effectively as a strong, ecologically friendly control of mosquitoes and mosquito-borne diseases. complete parts (a) through (i).

Mosquito fish.

Explanation:

Another ecologically friendly methods such as mosquito fish is also used for controlling mosquito populations. Mosquito lays egg in the ponds so these mosquito fish feeds on the larvae of mosquito and remove or reduce the population of larvae so very less number of larvae change into adult so this method is also a very good method for controlling of mosquito and no bad effect on the environment.

rain is the best answer

i think a) betsy can donate only blood to mark is correct because, mark and betsy have the same blood type. whereas nobody else has b+ blood so betsy can't donate to them.