A way for animals to avoid competition.
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Answer:
Scientists have been concerned that human activities could cause more plants and animals to become extinct than any point in the past. Along with human-made changes in climate (see above), some of these extinctions could be caused by overhunting, overfishing, invasive species, or habitat loss
1. This scenario is controlled due to the fact that they usually <span>test the effect of fertilizer, water and sunlight. Two last points pose as explanation for the second part of question.
2. It </span>can not be considered a theory because often it is supported by <span> hypothesis, so it's not direct thesis.
3. The way to know </span>that the y-axis is measuring the growth of the plant is to look at the graph and see that it <span>shows plant growing up.</span>