Question

what do scientists study to reconstruct past climate conditions?
○ tree branches, pollen grains, and rain water
○ pollen grains, tree rings, and fossils
○ rain water, tree rings, and fossils
○ fossils, pollen grains, and tree branches

Explanation:

To reconstruct past climate, scientists use proxies. Pollen grains show past vegetation (and climate), tree rings show growth patterns (related to climate), and fossils indicate past organisms' environments. Tree branches and rain water aren't reliable proxies for long - term past climate. So the correct set is pollen grains, tree rings, and fossils.

Answer:

B. pollen grains, tree rings, and fossils