Prevalent = Widespread
Requisite = Necessary
Propagate = Spread
Answer:YES
Explanation:A PDA is a type of congenital heart defect. A congenital heart defect is any type of heart problem that's present at birth. If your baby has a PDA but an otherwise normal heart, the PDA may shrink and go away. Some children need treatment to close their PDAs.
Answer:
For a simple machine.
Explanation:
Generally, you would call the instance of having great output force when inputing a smaller force - a <em>mechanical advantage.</em>
Answer:
there are all kinds of signals occur in the brain
Explanation:
Hope this help not sure if it is the right answer
3 and 8 because it has the same shell and background
