Many sub-Saharan tribesmen of Africa regularly use the blood, milk, and fur of their livestock, withoutkilling them. Based on this information alone we might classify this relationship as ____. However, the cattleactually derive an overall benefit because the herdsman also protect them from predators and help them findwater and food. Therefore, this relationship should instead be classified as ____.a. commensalism; mutualismb. mutualism; competitionc. parasitism; commensalismd. parasitism; mutualisme. predation; parasitism

The relationship between the tribesmen and their livestock can be seen in two ways. Initially, based on the information that the tribesmen use the blood, milk, and fur of their livestock without killing them, one might classify this relationship as parasitism. This is because in a parasitic relationship, one organism (the parasite) benefits while the other (the host) is harmed.

However, the additional information that the tribesmen also protect the livestock from predators and help them find water and food changes this classification. This is because the livestock also derive a benefit from the relationship, making it mutualistic. In a mutualistic relationship, both organisms benefit.

Therefore, the correct answer is d. parasit