Animals use behaviors to communicate with each Other and with people. Their actions show emotions such as fear, excitement, and happiness. Animal Behavior explores the ways common animals communicate. Kids Core is Rhea must-have line of nonfiction books for supporting the common Core State Standards for grades 2-5. Kids Core Features: A wide variety of high-interest topics, Well-researched, clearly written informational text, Primary sources with accompanying questions, Multiple prompts and activities for writing, reading, and critical thinking, Charts, graphs, diagrams, timelines, and maps.