Hi @bassam.alfatly,
This is the preprocessed data with ICA-AROMA non aggressively applied to it. As part of the process, the data are smoothed. You can read more about aggressive vs non-aggressive on other threads (e.g., ICA AROMA agg vs non-agg).
No, that is an fmriprep output.
That is up to you, some people prefer AROMA some do not.
Neither of them have global signal, csf, wm regressed out.
Best,
Steven