Can you purify water with charcoal? and also explain.

“Charcoal filters use activated carbon technology to filter out most of the chlorine found in tap water, so it will improve the water's taste without greatly reducing the water flow by much, which can be a problem with other types of filters and softeners.”
- https://bestpurification.com/how-does-charcoal-filter-water-myth-busting-filtering-concepts/

1= c 2= a or d3 = idk sorry 4= c5= c

Variables,control,conclusion and finally scientific theory