What causes the dissolved gases in magma to expand as the magma reaches the surface?.

hi there!

question - how does mountainous terrain affect settlements in a region? choose all answers that are correct.

groups trade with each other regularly.

people travel from settlement to settlement.

why: since they travel to go trade or visit it may be harder to get there because of the mountainous terrain.

hope this : )

b.

developed countries have tended to improve the environment, while developing countries have tended to damage it.