Why is "he" a variable in the open statement "he must be a huge baseball fan."?

As our current atmosphere formed, the concentrations of various atmospheric gases fluctuated. match each gas with the explanation that best describes how its proportion changed during the evolution of the atmosphere.

Which of the following was not a part of the armistice between germany and the allies? a. germany had to agree to the terms of the treaty of brest-litovsk. b. germany had to surrender its entire submarine fleet to the allies. c. kaiser wilhelm ii had to give his throne. d. all german troops had to be withdrawn from the western front.

Which factor contributed to the rise of african empires such as ghana and mali?