Answer:
Radioactive Decay – Measuring the Age of the Solar System The half-life of a radioactive element is the amount of time it takes for half of the atoms in a sample to decay from an unstable state to a stable one.
Explanation:
A Elephant eats some grass
A lion rolls in the sand
Elephants and lions are biotic(living), and grass and sand are abiotic (nonliving) and those are two interactions
28 is D
29 is A
30 is B
D. is the answer
Malory
Correct answer is A
