Ecological niche is: a. the surface area of the ocean

A single habitat may have different kind of organisms in it but within the habitat every organism has defined range of condition that it can tolerate , resources it utilises...

At a depth x m below the surface the pressure P =ρgx  Bulk strain = P/B =ρgx/B  →ΔV/V =ρgx/B  →ΔV = ρgxV/B  Density at x m below the surface, ρ'= ρV/V'   {V' is the compressed...

(4) Niche is the functional role played by the organism where it lives

(b) Due to the monsoon drift of Indian ocean, itsregular  direction of the ocean currents changes twice an year.

(b) Ocean currents are not slow most of the time and can be subsurface current also. So, statement '1' is wrong. But '2', '3' and '4' statements are correct.

(b) Climates in the Southern Hemisphere tends to be milder than those in the Northern Hemisphere. Southern Hemisphere has significantly more ocean and less land. The water heats up and...

(a) Atlantic Ocean

(c) A warm current in the Atlantic Ocean 

(c) Indian Ocean