Tidal currents are the tides which are channelled between islands, bays and estuaries. Tidal current has significance in power generation

Although Pacific Ocean is the largest ocean than other oceans, its area is far lesser than all other oceans are combined.
Continental slope, Guyots, Trenches and other landforms can be observed in the ocean which is far diverse than the continents.

The profundal zone is a very cold zone, such as an ocean or a lake, located below the range of effective light penetration. This is typically below the thermocline, the vertical zone in the water through which temperature drops rapidly. The lack of light in the profundal zone determines the type of biological community that can live in this region, which is distinctly different from the community in the overlying waters. The profundal zone is part of the aphotic zone.

All the above factors influence insolation.
Rotation of earth: The rotation of the earth on the inclined axis has a greater influence on the amount of insolation received at different latitudes.
Angle of inclination of sun rays: Since the earth is a geoid resembling a sphere, the sun’s rays strike the surface at different angles at different places. This depends on the latitude of the place. The higher the latitude, the less is the angle they make with the surface of the earth. The area covered by the vertical rays is always less than the slant rays. If more area is covered, the energy gets distributed and the net energy received per unit area decreases. Moreover, the sun’s rays with small angle traverse more of the atmosphere than rays striking at a large angle.
Length of the day: The length of the day determines the duration of sunlight which affects the amount of solar radiation received by the earth’s surface.
Transparency of the atmosphere: Atmosphere is not transparent for all the radiation coming from the sun because of different composition and layers. It is also one of the controlling factors of insolation to reach earth surface.
Earth’s Distance from Sun: The earth is revolving around the sun in an elliptical orbit, resulting continuous change in the distance between sun and the earth on annual basis. It leads to seasonal variation in solar energy received by the earth. During aphelion the northern hemisphere is facing the sun and therefore receives energy about 7 percent less than the perihelion (southern hemisphere).

1, 2 and 4 are correct.
Kaziranga is crisscrossed by four main rivers — Brahmaputra, Diphlu, Mora Diphlu and Mora Dhansiri and has numerous small water bodies.