3rd one .. hope this helped :)
<span>The pulse of a person can be located at many different points on the human body. There are times when it can be necessary to check the pulse in the orsalis pedis artery, which is the artery found on the dorsal foot, instead of using the carotid artery. One of the reasons for this would be to make sure that the person is getting proper blood flow into their extremity like the foot.</span>
Some guy from the 20th century
Answer:
Rocks across the ocean floor have alternating magnetic stripes.
Explanation:
Different types of evidence supported Hess's theory of sea-floor spreading: eruptions of molten material, magnetic stripes in the rock of the ocean floor, and the ages of the rocks themselves. This evidence made scientists take a second look at Wegener's hypothesis of continental drift.
2
I believe the answer is two, since it's H2O.
Hope this helps!