Answer:
It is the problem that affects many people within the society.
Explanation:
Small cliffs, hills, beaches, lakes and streams are the landforms that cover long island.
I believe the answer you're looking for is "object permanence".
⇒ cry
⇒ grow
⇒ makes eye contact/smiles
⇒ discover new sounds
⇒ listen & quiet down a couple of times a day
These are just some things healthy babies do when they are born, but there are so many more things too :)
“A number” = X
X= 2
so The number is 2....
You can check my answer by substituting “X” with 2