As magma meets the water, it cools and solidifies, adding to the edges of the sideways-moving plates. as magma piles up along the crack, a long chain of mountains forms gradually on the ocean floor. this chain is called:

ANSWER:

As magma meets the water, it 'cools and solidifies', adding to the 'edges of sideways-moving plates' as magma piles up along the crack, a 'long chain of mountains' forms on the 'ocean floor', this process or the chain is called Seamount.

EXPLANATION:

When the magma cools or make contact to water than it starts to turn solid and it starts moving up the building blocks while cooling.Magma is a hot semi-fluid or fluid material which is found within or below the 'earth's crust' from which 'lava' and other 'igneous rock' is formed by process of cooling.

May consider a group  g=({0,1},+)g=({0,1},+)where  ++  will work as the xor operator like we work in boolean algebra. note here, that ‘00’ and ‘11’ are not the usual 0 and 1 that we work with everyday. the elements are  called  ‘00’ and ‘11’ and  may not mean  zero (nothing) and one (single). ‘00’ is the identity for the given binary operator +, meaning that any element operated with ‘00’ gets us that element itself.  for a set  ss  in  g′g′  having more elements than just  {0,1}{0,1}  the values for  a+b∈sa+b∈s, such that  a∈s,b∈sa∈s,b∈s, have to be first defined, only then can you determine the value of  1+11+1. the answer could possibly have been  22  if oanswer is25,000