When you are writing your research topic, remember to
a. make a clear, firm statement. choose a side and stick to it.
b. keep it general and don't commit to either side.
c. present both sides equally so you will be fair.

Which statement contains an opinion? the ants serve to protect the acacia from other plants and herbivores. the acacia depends on pollinators for the exchange of genetic material. the acacia has no chemical defenses to discourage herbivores. the ants provide the acacia with the best protection from other plants and herbivores.