Final answer:
A wide tree ring indicates good tree growth, which is usually associated with favorable weather conditions such as sufficient rainfall or optimal temperatures during the growth season.
Step-by-step explanation:
A wide tree ring indicates good growth. This condition typically occurs during years with favorable weather conditions for tree growth, such as ample rainfall or an optimal temperature range. Tree rings, which are a representation of yearly growth, serve as a historical record of such conditions.
Each ring consists of a wider light-colored portion called the earlywood, reflecting faster growth during the wetter and warmer parts of the year, and a narrower dark-colored portion called the latewood, representing slower growth in preparation for dormancy. The science of studying tree rings and the information they contain about past climates is known as dendrochronology.