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This figure shows the ecological succession of vegetation in a temperate deciduous forest after a natural disaster such as a forest fire. Based on the figure above, which of the following is the BEST description of ecological succession?

A Succession is a gradual, ordered progression.

The time required for ecological succession to occur indicates that it is a gradual process, not a rapid one. This eliminates choices that conclude “Succession is a rapid”. The fact that the diagram shows different plants reentering the ecosystem at different times indicates that succession is an orderly process, not a random one. This eliminates choice “random process”. Therefore, the correct choice is “Succession is a gradual, ordered progression”.