Answer:
To keep a record of who has the evidence and when
Explanation:
Don't want anyone tampering with it, hope this helps!!!
Educated Guess Here!
Since Br-80 does not exist, maybe that means Br-79 or Br-81 have very unequal abundances. For example, Br-79 may have 75% abundance whereas Br-81 may have 25% abundance.
i think that the answer is d. millions of small rocky objects
Red litmus turns blue
Hope it helps
