Which of the following is an example of a long-term change to ecosystems?

Evolution

An environmental evolution is an example of a long-term change to natural habitats. It involves processes on how ecological forces affects variation in traits, population or long-term persistence of animals or plants in an ecological environment. In addition, evolutionary mechanism also contribute to genetically base morphological, behavioral, and physiological adaptations and diversity of species across the whole ecosystem.

1 - wave length

2 - amplitude

3 - crest

4 - trough

explanation:

duh.