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

The correct answer is C) Evolution.

Evolution is an example of a long-term change to ecosystems.

If something is constant in nature, it is "change." The environment is in constant change or evolution. From one state to the other, everything evolves into something different. It's part of life itself. That is why the ecosystems tend to evolve through time. External factors can mess with this change or interfere with evolution. That is the case of climate change or global warming, that accelerate the process and the time of transformation.

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