ninjas according to Milo

ninjas cut down the trees.

that's why they use the swords

to rescue people, help people, so the bad people won't catch them

they use the swords, cut down trees, he rolls them

and go over over the crack or make boats with them, so they can cross the river

and they also use them umm for like, for like running cross,

for like and chop them so that bad guys cannot cross, so that's why ninjas are for.