During an investigation, Sam observes the number of hummingbirds that come to his large bird feeder at different times of day. He fills the feeder to the top the first day and counts the number of birds at 6 a. m., noon, and 6 p. m. over ten days. What are the independent and dependent variables in Sam’s investigation?

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 answer is d (apex) good luck : ))

kelp are large brown algae that live in cool, relatively shallow waters close to the shore. they grow in dense groupings much like a forest on land. these underwater towers of kelp provide food and shelter for thousands of fish, invertebrates, and marine mammal species.

e) all of the above