These are not larvae, but pupae, likely of a moth, but we can't see enough of its fine features clearly to be certain. Many moths (and other insects) pupate in the soil, since it's more hidden from predators and insulated against weather extremes, especially because insect pupae are very vulnerable and almost defenseless in this nearly motionless state. (Some can wiggle to deter a predator, but can't otherwise do much to escape if a predator like a bird or mole finds them.) If you want them to finish maturing, they can be put back into the soil at about the depth you found them.

If you're curious to see what emerges, you can put them into a container (not airtight, and kept out of the sun) with a little bit of soil over them and some twigs to climb up when the adults emerge, but we can't tell when that emergence will take place...some pupae will only need a week or so to develop, while others pause in their development for months at a time so they can emerge in a different season. Once in a while, pupae are  parasitized, so what emerges is a wasp instead of the adult moth (or other insect).

Miri