Question

question 9 of 10
which happens to a developing child first?
a. eyebrows appear.
b. the eyes are able to see.
c. teeth begin to form.
d. the heart begins beating.

Explanation:

In fetal development, the heart begins to beat early (around 22 days after conception). Eyebrows appear later (around 20 - 22 weeks), teeth begin to form around 6 - 8 weeks but are not as early as the heart's first beat. The eyes' ability to see develops further along in pregnancy (around 28 - 30 weeks). So the heart beating is the earliest among the given options.

Answer:

D. The heart begins beating.