I believe the best answer is the gallbladder.
I hope this helped
Coal seams are far deep underground to be considered for opencast minings. These coal seams require underground mining. Since it is too deep underground, it can be used for mapping and correlation of sedimentary rocks or as a key bed.
Answer:
false
Explanation:
let me know if this is helpful
A - makes sure the results are close to the actual value
