Which statements describe the death of stars? Check all that apply. O A star's final stages of life dépend on its mass.
Stars die when they run out of fuel.
When a star starts to die, its core expands.
The outer portion of the star contracts.
O All stars become black holes when they die.

bc blah

explanation:

bc blah

since there are no options posted i'll give you a few examples.

a dolphin's flipper, bird's wing, cat's leg.

only about ten percent of the energy at one trophic level is passed on to organisms at the next trophic level. the remainder of the energy is used in life processes or lost as heat.