4. The simple machine shown in the picture is said to hold two pieces of wood better than a nail because
A. It has much more area gripping the wood.
B. It has a smoother surface compared to a nail
C. A nail has much more area gripping the wood
a. Only A is correct
b. Both A and C are correct
c. Only B is correct
d. Only C is correct

satellites are frequently used to make observations of the orbit on earth

the answer is z.

the human body has five levels of organization. level 1: cells. cells are the basic units of life and form the first level of organization. cells in the human body have specific functions. examples include nerve cells, blood cells, liver cells, and so on.