Atitle given to a muslim ruler, often a prince or tribal chief, is a. emir b. knesset c. sharia d. sunn

the answer is (d) all i did was look up pics of an !

explanation:

since the crust is readily accessible, scientists have been able to perform hands-on experiments to determine its composition; studies on the more distant mantle and core have limited opportunities samples. so scientists also rely on analyses of seismic waves and gravity and as well as magnetic studies.