The primary cause of infant respiratory distress syndrome is a. umbilical cord compression. b. maternal illegal drug use during pregnancy. c. prematurity. d. lack of surfactant.

RDS is a type of neonatal respiratory disease that is caused most often by a lack of surfactant in the lungs. A fetus's lungs start making surfactant during the third trimester of pregnancy, or weeks 26 through labor and delivery. Surfactant coats the insides of the air sacs, or alveoli, in the lungs.

Explanation:

answer:

there really is no point you just live your life day in and day out. following the same if not close to the same routine everyday.

Explanation:

answer:

It is true because...

Explanation:

but black guys,girls tend to have better voices than most people