A. The Grand Canyon was formed by the continuous flow of the Columbia River.
Explanation:
The Columbia River and the Grand Canyon do not have any touching point, let alone that the Grand Canyon has been formed by the flow of this river. Columbia River is a big river, and it flows through the northwestern part of the country. It is very important for the people that live in this part of the Untied States because the river flows into the Pacific Ocean, and it is big enough so that boats can move through it and go further in the mainland, so economically it is a very important feature in the region.
For a typical tide of the period of the semidiurnal period for the solar active tides are about 24 and 12 hours as [er the equilibrium tidal theory and those of the semidiurnal lunar tides are about 12.4 hours period of the day.
The tidal ranges occur to form the two high to two low tides a day and semi-diurnal has two low tides each and every day.
