<span>A heart attack happens when one or more of your coronary arteries become blocked.</span>
Answer:
3.5%
Seawater is water from a sea or ocean. On average, seawater in the world's oceans has a salinity of approximately 3.5%, or 35 parts per thousand. This means that for every 1 litre (1000 mL) of seawater there are 35 grams of salts (mostly, but not entirely, sodium chloride) dissolved in it.
Explanation:
Answer:
kills or slows down the activity of bacteria which can cause diseases