Hypothesis and conclusion
Answer:independent variable
Explanation:
Not a 100% sure but i believe it’s B
If you were to cross a large redwood tree, like for an example a sequoia, from the middle of the trunk you would first cross the annual rings, indicators of the trunk growth over the years, then after that you would cross the phloem, the ''piping'' of the tree responsible for the transport of water throughout the tree and in the end you would cross the tree's bark, the protective layer on surface of the trunk.
D they are easily contained charges so on and off is no problemo
