It is a strong thesis statement because it’s not summarizing your essay, but it’s introducing to main topic which are happening in your paragraphs.
Essay: “An Indian Father's Plea,” by Robert Lake
http://www.allenisd.org/cms/lib/TX01001197/Centricity/Domain/1747/Unit%202%20Student%20Book.pdf ?????
climatic conditions is one reason for extinction
:
HUH? What's the question?