Fill in the Blanks (Reading & Writing)

Tidal power stations harness the —rhythmicrhythmicallyrhythmrhythmical rise and fall of coastal water to spin submerged turbines. Because tides are governed by predictable —gravitationalgravitygravitategravitated forces rather than weather, output can be forecast years in —advanceadvancementadvancingadvanced, unlike wind or solar generation. However, the —upfrontoutrightprepaidimmediate cost of building turbines that withstand constant saltwater corrosion remains a major —barrierbarricadeobstaclehindrance to wider adoption.