what reflex would you observe if you make a loud noise or startle a baby?

If you make a loud noise or startle a baby, you would typically observe the startle reflex, also known as the Moro reflex. This reflex causes the baby to extend their arms and legs outward, then quickly retract them, often accompanied by crying. It is a natural response to sudden stimuli and is most prominent in infants up to about 4-6 months of age.