The speaker envisions the American identity as unifed yet diverse. The phrase "varied carols" describes an America that shares a common vision but also has different modes for achieving that goal. Americans are singing together, but each person is singing his or her own "varied carol" of the American song.
I A through D is basically all in order.
the first thing in each row is the secondary consumer, then from left to right it goes primary consumer, then producer.
For II, you just label each thing P or C
Produces make their own food
Consumers eat producers for energy
1. A bird is a C
2. Worms are C
3. Spiders are C
4. Pumpkins are P
5. Frogs are C
6. Leaves are P
7. Grass is P
8. Dolphins are C
9. Carrots are P
10. Deer are C