Fact 1: Abalance is used for measuring mass of an object. Fact 2: Mass The base unit of mass is the gram. Given the two facts above, what instrument measures in grams?

Available choices:
i. sweating.
ii. A balance.
iii. heat energy.
iv. A ruler.
v. nutrients.
vi. An anemometer.
vii. energy.
viii. A thermometer.
The answer is:
ii.