A caldera viscous or acidic lava plugs the vent of a volcano this leads to violent eruptions this causes the crater to be blown off the top of the volcano subsides or collapes forming a basin shaped depression.called a caldera .hope this helps
The Answer is Igneous rock hope you have a good day
Push factors are factors that make people want to leave their environment they are living in, while pull factors are factors that attract people to an environment. Examples of push factors are famine/drought, and war, and pull factors are good living conditions, good jobs, good education
