<h2>12km</h2>
<em><u>Explanation:</u></em>
1 cm = 4 km
3 cm = 4×3 km
= 12 km
<h2>follow me</h2>
Mountains are rich in natural resources, but they also block movement and trade and isolate regions and people.
A C and D. It cannot be b because scientists have warned people in the past about volcanoes and their possibility for erupting. Earthquakes cannot be predicted however there are warning signs one can look for.
