If the substances preform the same in a variety of test, the they are the same. This is because they should always be tested in multiple categorys to see if they are the same or at least alike.
flowers blooming before pollinators are active
reduction in the frequency of natural disasters
decrease in the background extinction rate
alterations in plants' growing seasons
extinction of certain species
new organisms moving into an ecosystem
(these are answer choices to your question
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To answer the question that is: "which factors affect a river's load", we have to understand that all the things mentioned are important. All these options (river's slope, streambed shape and volume of flow) affect the amount of energy that the river has to spend and the way the river spend that energy, so, it is right to mark the alternative d) all of the above.
