b. A new
species, D, is added to the island and Species C shows a strong tendancy to now
eat larger seeds entire curve has moved toward the right for size of seed
selected. What is the correct term for
the change observed here?
Well there isn't exactly enough information to go on, because it depends on what was introduced. I can tell this problem is way out of context. But base on what it's saying, this is still competition. The introduction of D must be eating all of the seeds that were smaller, so C is forced to eat the larger to survive. It can also be substitution.