Which of the organisms represented are notable agricultural pests?

II and IV
I and IV
II and III
I and III
An economic importance of the organism represented by IV is that

it transmits water borne disease to humans
it is destructive to farm crops
its faeces pollutes drinking water
it helps in the control of mosquito larvae
The adult form of iii is a vector of

sleeping sickness
river blindness
cholera
elephantiasis
The adaptive importance of nuptial flight from termite colonies is to
disperse the reproductives in order to establish new colonies
provide abundant food for birds and other animals during the early rains
ensure cross-breeding between members of one colony and another
expel the reproductives so as to provide enough food for other members
The gas evolved in the process is

carbon (IV) oxide
nitrogen
oxygen
carbon (II) oxide