निम्नलिखित में से कौन सी स्थलाकृति ज्वालामुखी क्रिया (Volcanism) द्वारा निर्मित नहीं होती है?

The lowered/downthrown blocks in Block Mountains are called:

A deep narrow valley with steep rocky sides is called a:

Which type of mountain range is formed by the uplifted folded sedimentary rocks?