The government of israel can be classified as a  parliamentary democracy.  which statement provides the best definition of this type of government?

a government ruled by an elected legislature and a prime minister

Explanation:

Parliamentary democracy is a type of democratic governance best described by the division of three branches - legislative, executive and judicial. The executive gets its legitimacy from legislative power, most often a parliament, who gives confidence to the executive, or president.

Israeli system of governance relies on the Prime Minister as a head of government. Parliament in Israel is better defined as Knesset, a unicameral national legislature, and is a part of an elected legislature. The political system is set out in 11 Basic Laws of Israel. While the existence of Constitution is a defining part of typical parliamentary democracy, Israel does not have one itself.  

the factors that the economies of the muslim empires prosper were:

1- land trade routes-located between three continents  

2- sea trade routes

trade contributed to the spread of muslim empires, and with that islamic culture led to a growing feeling of internationalism resulted in the transfer of technology, science, and other cultural forms.

d. i assume the underlined word is "role." reformat if it isn't.

explanation:

role is closest to part because when replacing words, "playing a vital decision," "playing a vital activity," and "playing a vital dollar" don't make logical sense. the only meaningful choice is "playing a vital part."

this fits one of merriam-webster's definitions of role: "a function or part performed especially in a particular operation or process."