How do tree rings tell scientists about the climate?

Question

Responses

Thick rings form in periods of heavy rainfall
Thick rings form in periods of heavy rainfall

Thin rings form in periods of heavy rainfall
Thin rings form in periods of heavy rainfall

Thick rings form in periods of drought
Thick rings form in periods of drought

Thin rings form periods of moisture

Answer 1

Thin rings form in periods of drought. Each year, a tree adds a new layer of growth under its bark, which produces a ring. The thickness of the ring indicates how much the tree has grown in that year. During periods of drought, the tree may grow less, resulting in a thin ring. Similarly, during periods of heavy rainfall, the tree may grow more, resulting in a thick ring. So, by examining the thickness of the rings in a tree's trunk, scientists can infer past climate conditions such as droughts and wet periods.

Answer 2

no

Answer 3

then what?