By giving examples of how scientist used drones to study volcanoes in Costa Rica

 By showing that lava sometimes ruins tools on the ground

By telling that drones collect samples of gasses

By sharing that drones batteries do not last long

They provide examples on why tools on the ground get destroyed by lava.

They explain how drones are not the best way to study volcanoes

They describe the steps the drones take to collect gasses from volcanoes

They tell about how drones are a good tool for scientist to use for studying volcanoes safely

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Description

Cause and Effect

Chronology