Mrs morel was alone but she was used to it

What is the central idea of paragraph 1 of the story?

Experiments were conducted to try to teach chimpanzees sign language

What is the rhyme scheme in this excerpt from longfellow's, "the tide rises, the tide falls? " (10 points) the tide rises, the tide falls, the twilight darkens, the curlew calls; along the sea-sands damp and brown the traveler hastens toward the town, and the tide rises, the tide falls.