Which of the following correctly describes the effect parasites have on their host's population size and on the host its

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Which of the following correctly describes the effect parasites have on their host's population size and on the host itself?
Which of the following correctly describes the effect parasites have on their host's population size and on the host itself? Parasites have a density-independent effect, and they usually kill their hosts. Parasites have a density independent effect, but they do not usually kill their hosts. Parasites have a density-dependent effect, but they do not affect host death rates. Parasites have a density-dependent effect, but they do not usually kill their hosts. Parasites have a density-dependent effect, and they usually kill their hosts.