Answer: The correct answer is B
Well, which one is "external?" Headaches and stomachaches are known to exist internally, isolation is setting yourself apart which may or may not be noticed, withdrawal is declining yourself from something, while an outburst of anger is very clearly seen and heard by all. All in all, I would say D.
Answer:
a)traffic signal
b)dont throw in garbage
c)recyables
d)parking zone
e)use of mobiles not allowed
f)zebra crossing ahead
Answer:
Blockchain technology or A blockchain
Explanation:
"Every time a person makes a transaction using a cryptocurrency — for example, using funds stored in his or her crypto wallet to send bitcoin to someone else — the transaction is recorded on a digital ledger called a blockchain."
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:)