Alzheimer's affects the brain as a whole, but it is not uncommon for someone suffering from it to be able to remember how to do certain things that they could do well before the condition set in. Because they hadn't had the particular conversation before or may be confused about what is being spoken about, they may not be able to have a sensible conversation.
No, we can not protect them against natural disturbances because we can't stop natural or the run of things! The can help there selves from like fires so there won't be a big damage done and that would for them to build there homes out of brick or something of the sort so there hold house don't burn down!
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We do not currently possess the ability to produce controlled nuclear fusion energy. B is your answer. Cheers.
Yes if they have there sirens on that is
Answer: limitation to resources
Explanation: As a population increases, its demand for resources also increases, and if the sufficient needs for resources are not met, then it may cause a limit on the population.