Explain why the plants from year 2-4 may not be
present in year 25-50

ecological succession.

Explanation:

The plant may not be present in 25-50 years due to ecological succession. in ecological succession, the vegetation such as small plants that is present replaces by the more suitable vegetation such as trees because the vegetation (small plants) did not receive nutrients and sunlight so they are unable to grow and finally dies due to lack of basic needs. So that's why plant may not be present 25-50 years.

c: warm water flows from the western tropical pacific toward south america. that should be the right answer! hope it .