They learned new shipbuilding technology from: w
The Greeks
The Americans
The Chinese
The Romans

buildings

explanation:

  b.

there are isolated pockets of farming, generally around rivers and oases, which are used for irrigation.

explanation:

allergens: overstimulate the nerve system

neurotics: attack nerve cells

mutagens: damage or otherwise alter dna sequence

generators: cause defects during growth and development  

carcinogens: cause unchecked cell growth

i hope you get the idea according to me these are the effects that happened.

answer; when the government fails to protect the fundamental rights of the people;