Tell them to seat down, and give them water
Answer:
3rd to 8th week of pregnancy.
Explanation:
The fetus is more prone during the 3rd to 8th week of pregnancy. The earlier the teratogen is exposed to fetus, the severe the effect is likely to be caused.
Only takes one student to spread the measles that's why every student need to get vaccinated.
I will need the picture or information to answer this.