Fact 1: Some parasites live on the surface of their host.

Fact 2: Bagworms are parasitized by several kinds of parasitic wasps.

Given the two facts above, answer the question "What can live on the surface of their host?" with the following options: 
- sunlight
 - fungi
 - embryos
 - dogs
 - water
 - insects
 - wasps
 - orchids


 

       wasps  