The Black widows relationship is a lot like other spiders. There commensalism is that the black widow spiders build their webs on trees and wild grass. They do it in trees to stay off the ground so theres a less chance of getting killed, and in wild grass so they are hidden from enemies.
Parasitism is in this relationship, because a tic lives in a lot of places a black widow would live. So that means a tic could find a black widow easy and get on them. The tic could bite and suck the blood from the widow and kill it, but the tic could get the poison from the widow and die. So this part of the relationship is harming.
Mutualism is in this relationship because there could be two widows that could mate and keep making more and more black widows, which is two species benefiting.
Parasitism is in this relationship, because a tic lives in a lot of places a black widow would live. So that means a tic could find a black widow easy and get on them. The tic could bite and suck the blood from the widow and kill it, but the tic could get the poison from the widow and die. So this part of the relationship is harming.
Mutualism is in this relationship because there could be two widows that could mate and keep making more and more black widows, which is two species benefiting.