And yet, it is water that has had the most influence on the physical aspects of the planet, causing erosion of our mountains and creating great canyons and valleys.
(it; is; water that has had the most influence on the physical aspects of the planet) (water; has had; the most influence on the physical aspects of the planet)
it water
is has had
water that has had the most influence on the physical aspects of the planet
the most influence on the physical aspects of the planet