Question

which of the following is an example of a long - term change to ecosystems?
a. seasons
b. tide cycle
c. evolution
d. population growth

please select the best answer from the choices provided

○ a
○ b
○ c
○ d

Explanation:

• Option A: Seasons are a yearly (short - term in the context of ecosystem long - term changes) cyclic change, not long - term.
• Option B: Tide cycles happen relatively frequently (daily or semi - daily), so they are short - term changes.
• Option C: Evolution is a process that occurs over many generations, spanning long periods (thousands to millions of years), representing a long - term change to ecosystems as it changes the genetic makeup and species composition over time.
• Option D: Population growth can be relatively short - term (e.g., over years or decades) and is more of a dynamic within a shorter time frame compared to evolution.

Answer:

C. evolution