The factor most important in this platform is the coastal current, which flows to the east parallel to the coast.
(The factor most important in this platform; is; the coastal current, which flows to the east parallel to the coast) (the coastal current; flows; to the east parallel to the coast)
The factor most important in this platform the coastal current
is flows
the coastal current, which flows to the east parallel to the coast
to the east parallel to the coast