Here are the sentences:
- With sea otters to keep the population of sea urchins in check, kelp forests can flourish. In fact, even two years or less of sea otter presence can reduce the sea urchin threat.
Then should the following sentence be 2 or 3?
- However, without sea otters present, kelp forests run the danger of becoming barren stretches of coastal wasteland known as urchin barrens.
OR
- In other words, without sea otters present, kelp forests run the danger of becoming barren stretches of coastal wasteland known as urchin barrens.
I understand that "however" is used to contrast. "In other words" means "in short" or "another way of saying the same thing". Can someone demonstrate if "however" or "in other words" makes more sense with the sentences above? I think the "however" is used incorrectly here. If both are correct, how can that be? (However is for contrast and in other words is for saying the same thing)