The first crusade is the attempt to recapture the Holy lands from the assaults of the Muslim invaders. There are three reasons in this movement naming: 1) to give freedom to Jerusalem and the Church of the Holy Sepulchre; 2) to defend the suffering Christians of the East and (3) to marshal the energy of the feudal lords and knights into a unified warfare. Among these reasons, the related ones is the invasion of Muslim Arabs in Europe. Answer is B.
That is no way to answer someone
In the 1700s, James Watt caused a revolution in transportation<em> by improving steam engine technology.</em>
He was a Scottish inventor and mechanical engineer. He made improvements on Thomas Newcomen's steam engine that was patented in 1698 and widely in use at the time of Watt's birth ( 1736).
It all started when Watt was given a model Newcomen engine to repair. He realized it was very inefficient and he began to find ways to improve its performance. He designed a separating condensing chamber for the engine to avoid huge losses of steam. He patented his improvements in 1769.
A unit of measurement of electrical and mechanical power -<em> the watt</em> - is named in his honor.
Answer:
a line of hereditary rulers of a country.
