Question

order the topics from broadest to narrowest. broader tree conservation efforts whitebark pine conservation efforts conifer conservation efforts narrower

Explanation:

Tree is a general plant type. Conifers are a group of trees, and white - bark pine is a specific type of conifer. So, the broader category encompasses the narrower ones.

Answer:

1. tree conservation efforts
2. conifer conservation efforts
3. whitebark pine conservation efforts