Answer:
An observation cannot be an inference, because an observation takes place before an inference can be determined.
Explanation:
I would say A. Mainly because the teacher is well trained for situation where it's critical or something like that..
Answer:
The independent variable in this question is the time of day the feeders are observed and the dependent variable is the number of humming birds.
Explanation:
The number of humming birds DEPENDS on the time of day the feeders are filled
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The chemical agent or hazardous material that interferes with the body's ability to transfer oxygen to the cells is: Hydrogen cyanide
It is an asphyxiant. It obstructs the utilization of oxygen in the organ of the body which is more delicate to low oxygen levels: the brain, the heart and veins, and the lungs. Hydrogen cyanide has a particularly harsh almond scent in any case it portrays a smelly "old shoes smell". It likewise has an unpleasant consuming taste and is much of the time utilized as a solution in water.
Hydrogen cyanide is also known as a synthetic military chemical. It is utilized in industry in mining, electroplating, fumigation, and the development of fibers, plastics, colors, and pesticides.
Learn more about asphyxiant here,
brainly.com/question/11588438
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