Three-month-old anna grace is staring intently at the new person who just came to visit her parents. what has happened?

I would say that Anna Grace has learned to respond differently to a familiar stimulus.
So before, when any new person would enter their home, the baby would either not pay much attention to them, or just play or go to sleep. However, now, even though the situation is similar (the stimulus is familiar), the baby has changed the way it behaves around a new person because it started staring at them.

Was giving by lincoln on march 4, 1865-as lincoln prepared to speak, the civil war was drawing to a close-lincolns address of 703 words was the second shortest inaugural address-lincoln mentions god 14 times-505 of the words were one syllable -he used the word "war" or it's pronoun 9 times