Which statement accurately describes one aspect of plate tectonics that involves subduction and seafloor spreading? Older crust is melted at subduction zones.
Crust is created at the coastlines of continents.
Continents do not move as a result of seafloor spreading and subduction.
Crust is created as the mantle hardens under the lithosphere.

What is the most effective approach the government can take to keep the air clean? create and enforce regulations that limit fossil fuel burning by industries use funds to understand why smoke and mold are causes of outdoor air pollutants educate people about the threats to outdoor clean air from visible forms of air pollution modify regulations under the clean air act by including expensive options to reduce air pollution