Original sentence: Most majorreligions in the world involve prayer in one way or another in their rituals.Scientific studies regarding the use of prayer have mostly concentrated on its effect on the healing of sick or injured people
Edited sentence: Most major religions in the world involve prayer in one way or another in their rituals.Scientific studies have mostly concentrated on its effect on the healing of sick or injured people.Scientific studies regarding the use of prayer has shown that prayer has no effect upon a situation