An example of mutualism would be
a. a tick living on a deer.
b. a leech living on a person.
c. two dogs competing for food.
d. bacteria living in human intestines.

As noted in the illustration, homo heidelbergensis was a tall, muscular hunter, who used both tools and weapons. because h. heidelbergensis was not a gatherer/forager, but ate a varied diet including meat and fish, we would expect to see what anatomical changes?