Since we can’t drink ocean water due to its salt content, why is polluting the oceans so much a concern for people?

Polluting the oceans causes harms to aquatic life which affects the food chain and the ecosystem.

let me explain.. on pollution.. the plants,weeds in the water get polluted . The small organisms which feed on these things are consumed by the bigger ones. the increasing amount of pollutants in each level leads to the death of fishes and other marine organisms. We, humans too depend on aquatic animals for food. Pollutants may enter our body which affects our health.Similar to the Minamata tragedy that took place due to mercury poisoning, it may take thousands of lives. Many seagulls and birds may get extinct due to poisoning or lack of food because they too depend on fishes for food.

hope it helps you!

Mantle convection  is the slow  creepingmotion of earth's solid silicate  mantle  caused by  convection  currents carrying  heat from the interior  to the planet's surface.[1][2]  the earth's surface  lithosphere, which rides atop the  asthenosphere  (the two components of the  upper mantle), is divided into a number of  plates  that are continuously being created and consumed at their opposite  plate boundaries. accretion occurs as mantle is added to the growing edges of a plate, associated with  seafloor spreading. this hot added material cools down by  conduction  and  convection  of heat. at the consumption edges of the plate, the material has thermally contracted to become dense, and it sinks under its own weight in the process of  subduction  usually at an  ocean trench.[3]this subducted material sinks through the earth's interior. some subducted material appears to reach the lower mantle,[4]  while in other regions, this material is impeded from sinking further, possibly due to a phase transition from  spinel  to  silicate perovskiteand  magnesiowustite, an  endothermic reaction.[5]the subducted oceanic crust triggers  volcanism, although the basic mechanisms are varied. volcanism may occur due to processes that add buoyancy to partially melted mantle causing an upward flow due to a decrease in density of the partial melt.secondary forms of convection that may result in surface volcanism are postulated to occur as a consequence of intraplate extension[6]  and  mantle plumes.[7]it is because the mantle can convect that the  tectonic plates  are able to move around the earth's surface.[8]mantle convection seems to have been much more active during the  hadean  period, resulting in gravitational sorting of heavier molten  iron, and  nickel  elements and  sulphides  in the core, and lighter  silicate minerals  in the  mantle.

Idk i think the answer choice is number 1