Volcanic eruptions spew alot of carbon dioxide and sulphur dioxide into the atmosphere. These gases when mixed with rain and run into oceans increase their pH. Additionally, these gases are greenhouse gases that increases atmospheric temperatures and consequently those of the seas and oceans.
Low pH and high temperatures kill marine life.
<span>A sequence of organisms through which energy is transferred, beginning with the primary producer, is a "Food Chain"
Hope this helps!</span>
Genetic diseases is one of the topics that will be covered in biology
