Leia o trecho abaixo e assinale a alternativa que melhor descreve o assunto tratado.
“What can we do about the problem of water? Clean drinking water is a basic need for all
people, but not everyone can get it easily. In some dry places, like deserts, it is expensive
to transport water, difficult to store it, and if a water system stops working, an engineer is
needed to repair it but sometimes the nearest engineer is miles away.”