Answer and Explanation:
Earths crust is broken into plates called tectonic plates. the plates move bc of convection currents in the earths mantle. convection currents are the movement caused with a liquid by the propencity of hotter and less dense matter to rise, and colder, thicker material to sink under the effect of gravitational pull, which as a result results in the transfer of heat. As a result these are moved by the heat composed by the common natural blight of radioactive component in the earth.
I think it refers to worldwide mutual dependence between nations/countries as we depend on each other for the key things like food etc. on a worldwide level.
Because gm crops can't replace everything. yes even they can make a better species and increase the productivity, but some countries or farmers might not have the technology to replace all the crops with gm crops, and they still have to rely on chemical fertilisers. chemical fertilisers can be deadly as if u overuse them, it can pollute the water and leading to euthrophication, where it can kill sea animals
