Earth science does anyone know the answer?

What is the amount of organic matter in all living organisms in a habitat called?

What do muslims believe a prophet is? a deity an angel a minister a messenger

If you were a casual recreational hiker with young children, which of the following trails would be least strenuous for a leisurely family outing? a. merced lake trail b. mirror lake loop trail. c. tenaya lake and tuolumne meadows trail d. el capitan trail