Final answer:
In 'My Side of the Mountain', various forest animals like rabbits, quails, and a heron are seen by Sam as communicating or sending messages to each other, contributing to the thematic elements of survival and connection with nature in the book.
Step-by-step explanation:
In the book My Side of the Mountain, Sam observes various animals that he believes send messages to each other within the forest. Though the question does not specify a particular part of the book, a close examination will show that animals such as rabbits, quails, and a heron among others, are suggested to communicate or exhibit behaviors that might be interpreted as sending messages or signals. Sam's experiences and observations of forest life play a significant role in his survival and understanding of the natural world around him.