Archaeologists count the rings in trees and observe the space between rings to determine the environmental conditions of a time period.
a. Dendrochronology
b. Fossils
c. Rock Strata
d. Carbon-14

a. Dendrochronology

Explanation:

Dendrochronology is defined as the science used by archaeologists to observe environmental changes or conditions of a period by counting the rings in trees and observing the space between the rings.

Dendrochronology is very useful to determine the precise age of trees and the trees which are recently undergoing radiocarbon dating.

Hence, the correct answer is "a. Dendrochronology".

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d

explanation:

i think that this is the best answer, but im sorry if this is wrong