Couldn't have given a worse answer. 1. String theory has no experimental backing. 2. It doesn't posit that currently fundamental particles become composite.

Couldn't have given a worse answer. 1. String theory has no experimental backing. 2. It doesn't posit that currently fundamental particles become composite. For a decent explanation see: https://physics.stackexchange.com/questions/38767/relation-between-quarks-and-strings https://physics.stackexchange.com/questions/38767/relation-b...