a long, seismically active submarine ridge system situated in the middle of an ocean basin and marking the site of the upwelling of magma associated with seafloor spreading. An example is the Mid-Atlantic Ridge.
<h2>THIS IS THE GOOGLE DEFINITION*</h2>
<span>Lactic Acid Fermentation</span>
1- The atmosphere (air)
2- Organic Matter (Which is non-living and the living)
3- Minerals and different kinds of rocks.
4- microorganisms (earthworms, insects, etc)
5- water (which is important.)
i think that the answer is c
Eventing is an equestrian event where a single horse and rider combination compete against other combinations across the three disciplines of dressage, cross-country, and show jumping.&Combined Training, and the name persists in many smaller organizations
