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Aujourd'hui, avec le transport et les communications modernes, les gens sont plus motivés et peuvent se déplacer. En effet, actuellement, plus de personnes émigrent qu’au tout autre moment dans l'humanité...

If we were to expand the brackets for this question we might be able to get to an answer however there is a much simpler way of solving the problem. As this question is made up of two expressions of x mul...

Es imposible cerrar los ojos ante la evidencia de cambios dramáticos en el clima. En efecto, las estadísticas muestran que las temperaturas globales subirán aún más en las próximas décadas. Se calcula que...

The first thing to identify here is that this is a question about evolution. Students should look to give a comprehensive explanation of how organisms evolve via natural selection, while framing the answe...

Farmers use nitrate containing fertilisers on their crops which are leached into river water due to rains and water run off, causing a build up of nitrates in pools of water. This increases the ion concen...