Volcanologists and seismologists are specialized

The correct answer is geologists.

A volcanologist refers to a geologist who examines the procedures taking place in the generation and eruptive activity of volcanoes and their historic and present eruptions, called volcanology.

Seismologists are geologists and scientists who study planetary activities and earthquakes, as well as their influences, like tsunamis. They utilize instruments to collect information and monitor the Earth's crust.

The answer would be angiosperms and dicots.