Analyze the following sentences below about the excerpt of ...
• Get enough sleep. Good sleep improves your brain performance, mood and overall health. Consistently poor sleep is associated with anxiety, depression, and other mental health conditions.
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?