Explanation:

all four

• Volcanic eruptions produce three types of materials: gas, lava, and fragmented debris called tephra.
• Several other hazardous phenomena are directly associated with eruption. There are ground fracture, ground subsidence, debris avalanche, lahars, glacier bursts, volcanic earthquakes and tsunamis.
• The main component of volcanic gas emissions is water vapour, followed by carbon dioxide (CO₂), sulphur dioxide (SO₂), and hydrogen sulphide (H₂S).
• Pyroclastic materials develop when rising magma is fragmented during an explosive volcanic eruption.
• In gas-rich melts the bubbles burst, and form highly porous rock fragments such as slag, pumice and ashes
• Volcanoes belched the gases that formed Earth's atmosphere. Those volcanoes could have also spurred lightning that fixed nitrogen, freeing it from nitrogen gas to form nitrogen-containing molecules that living things can use. And scientists have now found proof in the geological record