A) Tropical plants
B) polar plants
C) Sub-tropical plants
D) temperate plants
Correct Answer: D
Solution :[d] The rings are more visible in temperate zones, where the seasons differ more markedly. Many trees in temperate zones make one growth ring each year, with the newest adjacent to the bark. Hence, for the entire period of a tree's life, a year-by-year record or ring pattern is formed that reflects the age of the tree and the climatic conditions in which the tree grew.
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