Final answer:
The phrase 'Birds cried out merrily from the woods and the tops of trees danced to rhythms all their own' symbolizes joy.
Step-by-step explanation:
The phrase 'Birds cried out merrily from the woods and the tops of trees danced to rhythms all their own' symbolizes joy. The description of the birds crying out merrily and the tops of trees dancing indicates a sense of happiness and delight. This imagery conveys a positive and joyful atmosphere.