Answer:
1. Predation
2. Mutualism
Step-by-step explanation:
1. Predation is a type of relationship between two organisms in which one of them gets killed (PREY) as source of nutrition to the other (PREDATOR). This is the case in the relationship between fox and mice, in which the fox feeds on the mice.
2. Mutualism is the type of symbiotic relationship between two organisms in which both organisms benefit from one another in the relationship. In the case of this algae and spider crab, the algae benefits by getting shelter on the crab's back while the spider crab benefits by being camouflaged by the green algae.