large fields of gravel a tall mountain chain large freshwater lakes linked by rivers an uneven thickness of sedimentary layers
I am hesitating between 4 options to answer the following question, which option should I choose?
Question: Which of the following has been formed on the Asian continent by two continental plates that have been pressing together for millions of years?
Possibilities:
- large fields of gravel
- a tall mountain chain
- large freshwater lakes linked by rivers
- an uneven thickness of sedimentary layers

a tall mountain chain