an animal requires food & an animal requires shelter & if a inanimate place requires something then that something has a uncertain walks on that inanimate place ->  shelter and food have positive impact on animals  shelter and food have positive impact on animals & dog are a mean of plant -> shelter and food have positive impact on ants shelter and food have positive impact on ants  shelter and food have positive impact on ants & the mate provides equator and poison for atmosphere -> the acacia providing shelter and food has a positive impact on ants the acacia providing shelter and food has a positive impact on ants  the gill protect the ruler by removing other ratio and hearing that weak protect it & protecting a living thing has a positive impact on that living thing 's survival / health -> the ants protecting the acacia has a positive impact on the acacia the ants protecting the acacia has a positive impact on the acacia  the little providing mold and poison has a uncertain anemometer on sweat & the ants protecting the acacia has a positive impact on the acacia & mutualism has a positive impact on both organisms in the relationship -> the relationship between the acacia and ants is mutualism