Define standard of living:

the degree of wealth and material comfort available to a person or community

the degree of wealth and material comfort available to a person or community.

b

explanation:

the hyksos invasion. the hyksos were able to attack egypt successfully because of their skills in using bronze weapons, composite bows and the use of the horse and chariot during the invasion. although the egyptians depict a barbarian-type overthrow, the truth is the seizure was likely a relatively peaceful one.