Which of following refers to the process that facilitates plant communities gradually changing over a period of time in order to respond to their environments?
a
development
b
succession
c
growth
d
disturbance

The correct option is B

Succession 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.    

correct answer is option a.

tropopause, stratopause and mesopause have all in common aspect that is point of maximum temperature in its layer of the atmosphere. all layers of atmosphere observe abrupt change in temperature. tropopause is the boundary between troposphere and stratosphere. stratopause is the boundary between stratosphere and mesosphere. mesopause is the boundary between mesosphere and thermosphere. these all boundaries are ranges between altitude of 0 to 80 km.