Well, the magma in the volcano is boiling... and boiling... and boiling, until, it finally expands enough to erupt.
The density of an object or quantity of matter is its mass divided by its volume. ... Non-standard conditions can result in a change of volume, affecting the density of the materials. Also, certain temperatures and pressures can result in a change the state of the matter, which also affects the density.
The spirits of the ancestors, animal spirits too
New land, more resources, and the spread of Christianity
Answer:
cutting down of tress also known as shifting cultivation
