Complex sentence: TD resembles a Monte Carlo method because it learns by sampling the environment according to some "policy", and is related to dynamic programming techniques as it approximates its current estimate based on previously learned estimates (a process known as bootstrapping).
Split into simpler sentences: TD resembles a Monte Carlo method because it learns by sampling the environment according to some "policy". TD is related to dynamic programming techniques because it approximates its current estimate based on previously learned estimates (a process known as bootstrapping).