What is the difference between lightweight process and thread?

Question

I found an answer to the question here. But I don\'t understand some ideas in the answer. For instance, lightweight process is said to share its logical address space with other

Answer 1

Thread is basically task assigned with one goal and enough information to perform a specific task . A process can create multiple threads for doing its work as fast as possible. e.g A portion of program may need input output, a portion may need permissions.

User level thread are those that can be handled by thread library.

On the other hand kernel level thread (which needs to deal with hadrware)are also called LWP(light weight process) to maximize the use of system and so the system does not halt upon just one system call.