Dendrochronology involves dating of historic and geologic events through the study of: a. growth layers in shells. b. oxygen isotope profiles in glacial ice. c. remnant magnetism in iron-rich minerals. d. annual growth rings in trees.

D. Annual growth ring in trees.

Explanation: Dendrochronology is the study of the growth of tree rings. In each growth season, trees create a new ring that reflect the weather condition of that growth season. When hundreds of tree rings are put together, it tells us more about the environmental condition of the time in a specific year of the growth of the tree and the age of the tree at felling.

it is very hard for the climatologists to precisely predict how will the global temperatures be changing so there's lots of models, some of which differ significantly, this is due to multiple factors, and probably the most important is the human activity.

humans have been a key factor in climate change around the globe since the start of the industrial revolution, and in the past few decades the consequences are becoming more obvious. there's lots of emission of pollutants in the atmosphere as well as changing the environment on the surface itself, so it's really hard to predict how will that go in the future because there's some countries that are reducing the damage and are going towards green energy, while others are stubbornly continuing with pollution and damages to the environment.