You are presented with the question "Where do leeches live in relation to their hosts?" and the following answer choices: 
- In their beds
 - body water
 - competing for resources
 - In their shoes
 - loose soil
 - In their intestines
 - important habitats
 - On their surface

Now knowing that some parasites live on the surface of their host and leeches are external parasites, choose the best answer.


 

        On their surface 