Mystery #3Tier 2minibeasts / ants
How do ants march in a perfect line straight to a dropped crumb?
Drop a crumb in the kitchen and within an hour a neat line of ants is marching straight to it and back to their nest. No ant shouts directions, and a single ant can barely see past its own nose. Yet somehow hundreds of them find the exact same path. How do they all know the way?

Your guess
How do you think each ant knows which way to go to reach the food?
There's no single magic word to type, have a go in your own words, then reveal the answer to see how close you got.
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