The answer is : temperature estimated using any of several methods. The most important variable in reconstructing ancient climate is temperature estimated using any of several methods.
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Answer:
D. Hertzsprung-Russell Diagram
Explanation:
The Hertzspring-Russel Diagram or HR-Diagram is used to study the evolution of stars. It plots stars depending on the temperature against luminosity. Stars go through different changes depending on its mass at the beginning. These changes occurs in stages and each stage is marked by a change in temperature and luminosity.
D. natural gas is a renewable source
A) france i just did it on plato.
