The abbasids sought to lessen the power of the by moving their capital to baghdad.

The correct answer is Arabs.

The Abbasids sought to lessen the power of the Arabs by moving the capital to Baghdad.

The Abbasids was a great Muslim dynasty that ruled the Empire from 450 CE until 1258 when the Mongols invaded its territory. The powerful Abbasid caliphate moved the capital from Syria to Baghdad to lessen the power of the Arabs. Being in Baghdad, the capital was close to the Persians who were allies of the Abbasids.  

the of atp are the key to its ability to store and supply energy;

phosphate

the phosphate groups of atp are the key to its ability to store and supply energy. atp releases energy when it breaks bonds between its phosphate groups.