ITS D I THINK PRETTY SURE BUT DO TAKE MY WORD FOR IT.
<span>When jumping into water we notice resistance. this resistance is caused by water's
surface tension. This caused by water's great cohesiveness.
Cohesion in water is a property of water that makes its molecules attracted to each other. A water molecule is made of one oxygen atom bonded to two hydrogen atoms. The molecule has an unbalanced charge, with the oxygen side being slightly more negative and the hydrogen side being more positive.</span>
It is known as ISCHEMIA.
Ischemia occur when there is an hindrance in the flow of blood to a particular organ in the body. Because it is the blood that carry oxygen round the body, such an organ will not get adequate supply of oxygen. Ischemia is usually caused by blockage or narrowing of the arteries.
