Answer:
answer is option (c) child labour
The International System Units or the SI units is scientific method of expressing the magnitudes or quantities of important natural phenomena. There are seven base units in the system, from which other units are derived. This system was formerly called the meter-kilogram-second (MKS) system.
Answer:

Explanation:
The heat transfer through brick wall is:



The heat flow in a 18.6-h period is:



