Sample b is the control group because it’s the group not being tested and being kept the same.
n descriptive investigations, we still haven't formed any hypothesis yet so we seek information by asking question.
It's net repeatable because repeating the questions over and over again without any clue about what we want to seek is completely waste of time
Hey You!
I believe the correct answer to your question is C. The two minerals have a different arrangement of their atoms.
I Really Hope My Answer Helped You, Good Luck With Your Studies! :)
Trees in the rainforest are so tall because they compete for sunlight. Hope this helps!