Answer:
the mass of the system must remain constant over time
Explanation:
In other words matters cannot be created or destroyed, the overall amount will remain the same
<h2><u>TRUE</u></h2>
- <u>system of layout refers to the designs of planting trees.it is desirable planted in a systemic way</u>
<h2><u>hope</u><u> it</u><u> helps</u></h2>
Gradient = difference in elevation/horizontal distance
