Answer:
Metric ruler
Explanation:
You need to measure length, which is exactly what a ruler measures. The other option measure other things, like liquids or temperature.
It mainly depends on the population size and technologies in the environment (Human Interference falls into that) .
Where are the questions so i can answer them?
Answer:
why would scientists conduct investigations on a newly discovered alternative fuel?
to confirm that the alternative fuel is cleaner than fuels currently used
Explanation:
As an alternative fuel, it must be validated whether it is better than the one currently in use
