metres
a centimeter
Kilometers
Its height (above mean sea level): metres Its length: kilometres - or metres if it is a really short trail.
You can measure any object you like using tonnes, however, unless the object is a massive one like an Elephant or a Bus, there is likely to be lots of zeros after (or before) a decimal point which would make it not a very sensible unit to measure the mass of the object.
You would use the unit of measure called "kilograms" to measure the mass of an elephant.
The metric unit commonly used to measure height is the meter. So, you would measure the height of Big Ben in meters.
metres
Centimetres.
Feet.
A millimetre.
Metres.
You would use kilograms (kg) to measure the mass of an elephant.
To measure weight you would use Kg To measure height length or girth you would use metres
I would use meters.
You would use meters.
You would use the metric unit of meters to measure the height of a gallon of milk.