Which of the following statements is true regarding most ocean currents?(Giving brainliest) -Warm water is more dense than cold water.

-Ocean currents have a great effect on air temperature.

-Ocean currents have little to do with regional climates.

-The amount of salt in the ocean has no effect on ocean currents.

ocean current have a great effect on air temperature

answer: - b cells

explanation: -

so, the b cells mediate their action by identifying the antigens present on the surface of the pathogens and then producing antibodies in return to mediate its effect.

answer : haversian

[explanation: -(compact bone is organized as parallel columns, known as haversian systems, which run lengthwise down the axis of long bones. these columns are composed of lamellae, concentric rings of bone, surrounding a central channel, or haversian canal, that contains the nerves, blood vessels, and lymphatic system of the bone)]