Question

select the adjective that is a derivative of help meaning \without the ability to help or care for yourself.\ suggestion childish helpful treatment helpless forgetful illness suggestible childhood treatable forgetfulness

Explanation:

We need to find an adjective derived from "help" meaning "without the ability to help or care for yourself". "Helpless" is an adjective formed from "help" with the suffix - less, which often means without. "Helpful" means able to help. The other words like "suggestion", "treatment" etc. are not relevant adjectives derived from "help" with the required meaning.

Answer:

helpless