Answer:
The correct answer will be-
1 .Arbovirus is an arthropod-borne virus
2. An arbovirus is maintained in nature through biological transmission
Explanation:
An arbovirus is a group of the virus which spreads in nature especially infect human from the infected insects (Arthropods). The most common arthropods spreading the disease caused by the virus is the mosquitoes and few ticks, gnats and fleas.
The viruses are maintained in nature through biological transmission between the vertebrate hosts by blood-sucking arthropods like mosquitoes.
Thus, the selected options are correct.