Question

Why do most biologists believe that true commensalism does not exist?

1. an ecosystem usually has more parasites than hosts

2. animals of different species usually do not like to work together

3. the relationships are probably mutual or parasitic

4. animals of the same species rarely compete with one another

Answer 1

i go for option 3

because in most of the causes the mutual between is alway parasitic

Answer 2

3. the relationships are probably mutual or parasitic. Commensalism is a sort of long-term interaction where members of a species reap benefits while the other one is neither harmed or benefitted.

The commensal species may get shelter, movement, nutrients, or support from its host species and the host can stay unaffected.

Such a type of relation is generally between a smaller commensal and a bigger host.