O conceito de migração implica: a) O cruzamento de uma fronteira por período mínimo de 6 meses.

b) Envolve todas as deslocações das populações.

c) Diz respeito apenas a movimentações forçadas.

d) Está relacionado com às deslocações de pessoas por mais de 1 ano.

The answer to the question is c.

Mantle convection is the process that drives plate tectonics. the theory of plate tectonics states that the crust is divided into plates that float on the semi molten mantle below. the circular motion of the magma as it slowly rises and falls or move though convection cells drags the plates along causing them to move. the heat source in the lamp would represent the earth's core. the core is the source of energy that drives convection in the mantle. the lava represents molten magma under the earth's surface. if the lava lamp had floating pieces they would move as the circular motion of the lava in the lamp as it rises and falls would move them along the surface. these floating pieces would represent pieces of the earth's crust. 

Individual rights and freedoms protect every person in canada whether they're citizens or not. the only right, non-citizens don't have is the right to vote.