system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5: What would earth be like without the moon?
gpt
Without the moon, many of the species of animal which currently exist would die off, for one.  Animals which depend on the existence of the tides, for instance.  Or animals which use the light of the moon in navigation (like it is believed moths do).  In fact, humans are highly dependent on the tides as well, and have been for as long as we've been taking advantage of the oceans' bounty.  Would the Earth fall apart or something without the Moon?  No.  But if the Moon suddenly stopped existing or was somehow flung out of Earth's orbit unexpectedly, it would have serious impacts on the biosphere as a whole.