The Saragasso Sea is a vast patch of Atlantic Ocean characterized by an abundance of floating brown seaweed called `Sargassum`. The formation of this seaweed is due to the deposit of marine plants and refuse carried by ocean currents.

Now, let`s examine each option to determine the correct answer:

Option 1 states that the Saragasso Sea is formed due to the deposit carried by the North Atlantic current. This is plausible, as ocean currents play a significant role in the movement and accumulation of marine debris.

Option 2 states that the Saragasso Sea is formed due to the deposit carried by the Canary current. This option alone is unlikely to be correct because the Canary current flows along the western coast of Africa and may not directly contribute to the formation of the Saragasso Sea.

Option 3 states that the Saragasso Sea is formed due to the deposit carried by the North Atlantic Equatorial current. This option is plausible because the North Atlantic Equatorial current flows along the equator and can contribute to the movement of marine debris towards the Saragasso Sea.

Based on the analysis, option 4, which includes all three currents (North Atlantic current, Canary current, and North Atlantic Equatorial current), seems to be the most accurate answer