LitCharts assigns a color and icon to each theme in The 5th Wave, which you can use to track the themes throughout the work.
Trust and Belief
Survival and Perseverance
Warfare and Dehumanization
Family
Summary
Analysis
Two soldiers took off racing after Cassie. She knew she couldn’t outrun or overpower them, so she decided to try to trick them. She headed toward the tree with her M16.
One of Cassie’s main traits is her resourcefulness, which helps her survive even though she isn’t as physically strong as a soldier. Her resourcefulness is essential to her survival.