Answer:
Stone does not have organic matter in it to burn in presence of air. Hence, it is a non combustible.
Rocks are quite bundled up together. Hence, they are very difficult to get mixed together.
12 Dahlias, 30 Tulips
12:30
12/2=6
30/6=5
12/6=2
=2:5
This thermochemical equation needs to be balanced. Hence, option B is correct.
<h3>What is a balanced chemical equation?</h3>
A balanced equation contains the same number of each type of atom on both the left and right sides of the reaction arrow.
The balanced thermochemical equation is:
→ 
Hence, option B is correct.
Learn more about the balanced chemical equation here:
brainly.com/question/8062886
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Explanation:
option A skeleton system is correct option
hope this helps you !
Metal pots are good for cooking because they have heat conductivity.