Question

A student is conducting research on the impact of humans on whooping crane populations in the North America. Which statement best supports the student’s claim that animals have been positively impacted by human intervention?(1 point)
Responses

In the early 1900s, the U.S. and Canada jointly signed a migratory bird treaty.
In the early 1900s, the U.S. and Canada jointly signed a migratory bird treaty.

In the 1800s, North America was home to over 1,000 whooping cranes.
In the 1800s, North America was home to over 1,000 whooping cranes.

Captive-bred whooping cranes have been introduced to natural environments.
Captive-bred whooping cranes have been introduced to natural environments.

Although the hunting of whooping cranes was criminalized, their numbers continued to decline.

Answer 1

Captive-bred whooping cranes have been introduced to natural environments. This directly shows a positive human intervention to help the species recover.