The example given that best illustrates a critical period is C. a fetus developing fingers and toes between 28 and 54 days in uterus.
<h3>What is a critical period?</h3>
Critical periods in the development of a fetus refers to those periods where the fetus is still developing and so might suffer some body or internal organ defects if the conditions necessary for them to grow are absent.
One such period is when the fetus is growing fingers and toes when they have been in the womb for between 28 and 54 days. This period is critical because there are certain actions that the mother can take which would lead to a deformity in the arms and feet of the fetus. It is therefore important to be careful in the critical period.
Options for this question include;
A. a child learning to walk
B. a child learning a second language before age 4
C. a fetus developing fingers and toes between 28 and 54 days in utero
D. a child learning to ride a bike between 5 and 6 years of age
