Answer:
The correct options are A and E. An ice age and a mountain building are long-term environmental changes.
Explanation:
Long term environmental changes are changes in an environment which occur over a long period of time. These type of changes do not have as devastating effects on populations as short term changes. Short- term changes like earthquake, tsunami, fire etc happen suddenly and do not give time to the organisms to adapt to the changes. Long- term changes like ice age and a mountain building evolve over a long period of time and most of the organisms get adapted to these conditions.
Answer:
The correct answers are "an ice age" and "a mountain building".
Explanation:
Long-term environmental changes are considered events that affect the environment during an undetermined period of time and usually at a global scale. Ice ages are long-term environmental changes because they last around 100,000 years and reduce the temperature at the point that glaciers cover most part of the Earth. A mountain building is also a long-term environmental change because it is created by large-scale movements of the Earth's crust and once a mountain is formed it stays for an undetermined period of time. Other examples of long-term environmental changes include global warming, urbanization and radioactive pollution.
