Can a vegetarian or low-salt diet reduce blood pressure? men with high blood pressure are assigned at random to one of four diets:
(1) normal diet with unrestricted salt;
(2) vegetarian with unrestricted salt;
(3) normal with restricted salt;
(4) vegetarian with restricted salt.
this experiment has one factor, the type of diet. two factors, high blood pressure and type of diet two factors, normal/vegetarian diet and unrestricted/ restricted salt. four factors, the four diets being compared. three factors, men, high blood pressure, and type of diet.

Yes, These could help.

Explanation:

The chemical composition of salt is made by an acid and a base, in general it doesn't cause any good reaction in our bodies, just adds taste to the food but no more, and basically for its chemical composition it could increade the blood preasure level, other important fact is, during the salt's process extraction, this is mixed with other chemicals to make it lighter and whiter, and at the end all this chemicals flow into our blood system, acidifying our body and increasing blood preasure.

they need it to survive

explanation:

the trait of personality falls in the middle of the diagram because personality is a mixture of ones nature and environment.