Canning is great if you find yourself with a windfall of free produce. Otherwise I’m kinda inclined to agree: canning isn’t worth it unless you enjoy the process and consider it a hobby.

… How did we get here from mountains?

“Leaving a trail of breadcrumbs” has been a phase for a long time. That that’s what stuck, I suspect, because “breadcrumbs” is more specific and memorable than “pebbles,” or because the breadcrumbs would be noticed and followed by a hungry someone other than the person who put them there (unlike the pebbles, which are of no use to a random passer-by).