The correct spelling for all four words is "relevant".
The word "relevant" means closely connected
The sentence is: "Babies cry when they are hungry."
The word "cry" shows the action performed by the subject "Babies", so it is a verb.
8 × 125 = 1000.
Natural numbers start from 1 (1, 2, 3, ...), so the 150th natural number is simply 150.
