In a study by shaw and colleagues, the higher the level of maternal obesity, the higher the rate of neural tube defects. folic acid supplements

Answer and explanation:

After some research, I can make up a conclusion and stablish that obese women have less of a tendency than average BMI females on taking folic acid supplementation, and the main reason for this fact is that there is a large number of overweight women who happen to have unexpected pregnancies because of hormonal contracpetion going wrong.

So birth defects (like neural tube defects) are one of the many problems that an obese woman can have during her pregnancy. This is why it's important to always have a balanced diet, but even more during this life stage.

answer; earthquake;

two jet streams that directly affect the formation of weather in the continental part are a polar jet and a subtropical jet. they are responsible for the transportation of weather systems, which directly affect people. the polar front is the boundary between cold air from the north pole and warmer equatorial air. both the polar jet and the subtropical jet blow from the west to the east, and follow the boundary between cold and warm air.

the strongest jet streams are polar jets, while subtropical jets are somewhat weaker.

the right answer is c. the polar jet stream is generaly stronger than the subtropical jet stream.