They wanted to share their faith like any other religion. In the Umayyad dynasty, there was less of an incetive to share the faith because believer would have to share the booty. But in the abbasid Empire that was done away with so the mass conversions were encouraged for all people of the empire. In order to have a more unified and loyal system, converters were considered equal to the first believers. By encouraging converts it may have helped their empire unify better and helped administration in the government as many Persians dominated the imperial administration. Good question by the way
<span>The statements that are true in this list were The Taft-Hartley Act forbids a closed shop, John Wilkinson invented the cylinder boring machine, Each manor was owned by a nobleman to whom the serfs owed allegiance, the burghers looked to the monarch for protection, and Maudslay designed a number of machine tools which were instrumental in speeding up and improving work.</span>
And B. physical systems because there are volcanoes, oceans, land, mountains, forests