Which supplemental text best supports a first-grade unit on how animal parents and offspring survive based on behavior?

The choice of a storybook about a wolf pack and its pup is the most relevant supplemental text for supporting a first-grade unit on how animal parents and offspring survive based on behavior. This storybook can illustrate dynamic relationships between parents and their young, showcasing behaviors that are essential for survival, such as hunting, protection, and nurturing. By engaging with the narrative, students can gain insight into the specific actions and roles that animal parents play in the life of their offspring, helping them understand the critical lessons of survival in the animal kingdom.

In contrast, a nonfiction book on various chicken breeds may provide information about chickens but lacks a specific focus on parent-offspring behaviors, making it less effective for this particular curriculum goal. A biography of a childhood-experienced biologist, while potentially inspiring, does not directly relate to the behavior of animal parents and their young. Similarly, a picture book on animal camouflage patterns, although it may be interesting, does not concentrate on the parent-offspring relationship and thus would not meet the objective of exploring survival behaviors specifically linked to family dynamics in the animal world.