They began to wear protective masks and clothing.
Answer: Fall of the berlin wall, War for Oil, Vietnam conflict, and Moon landing
Explanation:
Positive: higher population, more facilities, such as parks, roads and recreation centres
Negative: buisy, noisy, tight
The answer for this question is B
Answer: Two Years
Explanation: Members of the House of Representatives serve two-year terms and are each year eligible for re-election. However, Senators serve six-year terms and Senate elections are distributed over even years so that only around 1/3 of the Senate is up for reelection in each year.