In israel who is the head of government (most power)? how is he chosen?

The Prime Minister of Israel holds the majority of the power.

Explanation:

However, there is a president. He is part of the process of choosing a Prime Minister. The public vote for parties and politicians. The parties have leaders who then advise the president who they would like to be Prime Minister. After this, the President will nominate a Prime Minister who then has 42 days to put together a coalition of political parties that can form a majority to back the nominee.

answer; not notated (at least, not in the traditional sense) and includes many improvised sections and solos;