Final answer:
The interactions between cellulose-digesting organisms in the gut of a termite and the termite are positive and beneficial.
Step-by-step explanation:
In the gut of a termite, there are cellulose-digesting organisms that have a mutually beneficial relationship with the termite and the termite itself can be described using the symbols +, -, and 0 to signify positive, negative, and neutral effects, respectively.
In the case of the symbiotic relationship between termites and their gut flora, the interaction is positive for both parties. The cellulose-digesting organisms, which are mainly symbiotic protozoa, allow termites to break down and gain energy from cellulose, something termites cannot do on their own.
Meanwhile, these organisms receive a stable habitat and nutrients. Thus, this relationship is a mutualistic interaction, where both organisms benefit from the relationship, depicted symbolically as + for the termite and + for the cellulose-digesting organisms.