1. in wich type of symbiotic relationship is one organism while another organism is neither benefitted nor harmed, a mutualism. b predation. c commensailism. d parasitism.

2. heartworm is a tyoe of worm that enters a dogs body through a mosquito bite it produces offspring that lodge in the dogs arteries and feed off of surrounding cells which type of relationship is this. a mutualism b predation c commensalism d parasitism.

3. nitrogen fixing bacteria live in protective nodules (bumps) on the roots of some plants these bacteria are able to convert gaseous nitrogen from the air into a farm of nitrogen that the plants can use which type of relationship is this. a mutualism b predation c commensalism d parasitism.

4. how do mutualism and parasitism compare, a at least one organism is in both cases. b at least one organism is harmed in both cases. c organisms are only harmed in both cases. d organisms are only in one while organisms are only harmed in the other.

for your i just dont understand these answers i will mark as brainliest