Ecological succession occurs because?

a) conditions become unfavorable for one community and favorable for another
b) the animal community changes
c) the climate changes
d)man has changed farmland into cities
e) one climax community follows another

e

I disagree.

http://php.scripts.psu.edu/dept/nkbiology/naturetrail/succession.htm

To determine why ecological succession occurs, we can look at each of the options.

a) Conditions becoming unfavorable for one community and favorable for another is one of the major reasons for ecological succession. As the environment changes, certain species are better adapted to the new conditions and become dominant.

b) While changes in the animal community can be a result of ecological succession, it is not the primary cause. Succession often starts with changes in the plant community, which then affect the animal community.

c) Climate change can trigger ecological succession in some cases. Changes in temperature, precipitation, or other climate variables can create new conditions that favor different plant species and consequently lead to the replacement of one community by another.

d) While human activities such as converting farmland into cities can cause changes in ecosystems, they are not inherent drivers of ecological succession. Human activities can disrupt or modify existing communities, but succession typically occurs due to natural processes.

e) One climax community following another is an accurate description of ecological succession. Over time, an existing community goes through changes until it reaches a stable and relatively balanced state, known as a climax community. However, this climax community is not static and can also evolve and change through succession.

So, option e) "one climax community follows another" is the most appropriate answer as it encompasses the natural progression of ecosystem changes.