<u> Succession</u> refers to the process that facilitates plant communities gradually changing over a period of time in order to respond to their environment.
Explanation:
Succession can be described as changes that occur in an ecosystem in response to the changes in the environment or any other disturbances.
Succession can be of two types. 1. Primary succession 2.Secondary succession
Primary succession occurs on lands where there was no life before. With time, plants start to grow here and a community is developed.
Secondary succession occurs on lands that have been destroyed due to any disturbances like a flood or a fire. Over time, new plants start to grow on this land and a community is developed.
When examining a cross section of rock layers, the oldest layer is on the bottom. This is because over time, newer rock layers continued to form on top of the oldest one.
