How do you make a composite volcano erupt?

Question

simple ways for an erupton

Answer 1

Composite volcanoes typically form along subduction zones (ocean - continent plate boundaries). They tend to have higher viscosity magma (andesite and dacite) which allows for more gas pressure to develop. This produces more explosive eruptions.

Some examples of subduction zones are the western coast of the USA and South America. The Cascades and the Andes were and are currently being formed by subduction related processes.

Answer 2

You don't, it erupts when the geologic conditions are correct.