The answer is B I believe.
Answer:
B
Explanation
Ice wedging, pressure release, plant root growth, and abrasion can all cause mechanical weathering
( Ice Wedging When water freezes, it expands. When water freezes. in the cracks and pores of rocks, the force of its expansion is strong enough to split the rocks apart)
Answer: Increased water temperature caused by the industrial plant.
Explanation: this is explained in the text lol.
Answer:
The comparison of the size between groups.
Explanation:
This is like a quasi experimental design, where you need to compare the two groups after you apply the stimulus to the experimental group.
To do this comparison you need to collect the size measurement data, that's when you're gonna support your hypothesis or not. Why size data between groups? Simply because your hypothesis is about larger growing cotton bolls, and that refers to size.
Answer: Food
Explanation: Organisms get the energy they need through food. Some organisms, called autotrophs, create their own food using photosynthesis.