This might not be the right one but I think its the first one...........................
Answer: C. Slow-to-warm-up
Explanation: According to Thomas and Chess,there are different temperaments in children one of which is Slow-to-warm-up. Slow-to-warm-up are kids who find it hard to move with the changes of their environment,they are generally mellow,less active from birth,and might find it very difficult to adjust to new situations.
Answer:
Improve water treatment and waste facilities
Explanation:
I believe the answer would be, "Posture".