5) most countries have outlawed whaling, but some countries have few or no laws protecting whales. why are conservation groups pushing for worldwide restrictions on whaling? a) whales are dangerous threats to fishing grounds. b) whale oil is desperately needed as fuel worldwide. c) unrestricted whaling could lead to their extinction. d) oceans are over populated with whales and their numbers need to be reduced or many will starve.

The answer is C. Whales are in danger of going extinct due to serious illegal (in some places it's legal) whaling practices. Another way to find this answer is to look at your context clues. Conservation means to "protect" something or to "save" it. The conservation group is pushing worldwide restrictions on whaling, which means they are trying to save whales by trying to stop whaling practices.

The correct answer is C. Currently, it is illegal to go whaling (or whale fishing) yet, some countries have not done so. Extreme fishing of any sort can lead to extinction, therefore, it's C, Furthermore, A is incorrect as nothing in the text points to that, B is incorrect as there is plenty of oil, and none of it comes from whales. D is incorrect as many people hunt whales for fun, or for occasional food, never as a meal they can live on, plus, if you live near the water, you could always fish for fish. Hope this helped.

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.

The answer is overmatching