Pom Identify the independent variable in the following question: How does the size of a bicycle tire affect the distance it will
travel when it is pedaled in a given number of times.

a.size of a bicycle tire
b. the distance the bike will travel
c.None of the above

Given that the size of a tire determine the vase volume of a bike and it’s speed the choice is C. None of the above

The question is asking us to say what organisms in the same ecosystem are. Organisms in one ecosystem are all dependent on each other: they feed on each other or are dependent on the tissues of the other organisms when they die - this is called "interdependence" - dependence from each other , so the answer is b.interdependent