Which statements in this passage about volcanoes do not contain factual errors?
the hawaiian islands are known for their volcanic activities. in fact, the islands were formed from volcanoes.1. before a volcano erupts, earthquake activity beneath the volcano decreases.2. scientists use seismometers to measure the earthquake activity that occurs beneath a volcano. they then predict the eruption of that volcano.3. when a volcano erupts, the amount of carbon dioxide and sulfur dioxide emitted decreases. 4.scientists measure the amount of these gases to determine the amount of magma present in the volcanic reservoir.