Which of the following is a long-term environmental change that would require an organism to adapt?
А
seasonal change from spring to summer
B
a storm passes overnight
С
an earthquake
D
change in average temperature of a region

D change in average temperature of a region

Explanation:

А  seasonal change from spring to summer  - these seasonal changes happen often and the organism will already be used to such changes

B  a storm passes overnight  - while this could have a significant impact on the ecosystem, the storm is not a long term change

С  an earthquake    - while this could have an impact on the ecosystem, this is a single event and is not considered a long term change

D  change in average temperature of a region - this is a long-term change that will effect many aspects of the organisms lives. This includes food supply, need for shelter, water availability, energy requirements, etc.

the correct answer is b