Questão de Língua Inglesa

Analyze the following sentences below about the excerpt of the text 1 “Today, there are new tools, evidence-based treatments, and social support systems that help people feel better and pursue their goals”. I. The structure “there are new tools” is in the Simple Past Tense. II. The structure “evidence-based treatments”is a nominal group connected to “social support systems that help people feel better” and the headnoun is “systems”. III. The word “pursue” can be replace by “seek”. IV. In the expression “that help people feel better” it refers to “social support systems”, “evidence-based treatments” and “new tools”. Which ones are correct?