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Option 1 states that both statements are true and that Statement II correctly explains Statement I.
Statement I states that incised meanders are formed in the mature stage of a river. This means that incised meanders occur when a river has reached a certain level of maturity or development.
Statement II states that incised meanders are characterized by rejuvenation and upliftment of land. This means that when a river forms incised meanders, it goes through a process of rejuvenation and upliftment, resulting in the formation of these distinct landforms.
Option 1 suggests that both statements are true and that Statement II correctly explains Statement I. In other words, incised meanders are formed in the mature stage of a river and this formation is characterized by the rejuvenation and upliftment of land.
Therefore, option 1 is correct and the explanation provided in the question is accurate.