trend toward increased crust movement over time. series of events that happens quickly. continuing long-term process. process that has a predictable pattern.
I am hesitating between 4 options to answer the following question, which option should I choose?
Question: The movement of crustal plates is best described as a
Possibilities:
- trend toward increased crust movement over time.
- series of events that happens quickly.
- continuing long-term process.
- process that has a predictable pattern.

continuing long-term process.