Which statement best describes long-term environmental changes? a. they occur suddenly. b. they do not typically cause changes to dna. c. they cannot occur gradually. d. they can occur anywhere from thousands to billions of years

D for sure. Just like how the ground rises over millions of years.

The right option is; d. They can occur anywhere from thousands to billions of years

Long-term environmental changes are environmental changes that occur gradually over time and affects organisms over generations. Long-term environmental changes can occur anywhere and it allows organisms to adapt to its effect. Examples of long-term environmental changes include global warming, deforestation, sun’s intensity, earth’s orbit and urbanization.

weathering is the answer.