Answer:
Americans lived in cities is the correct answer.
Explanation:
Answer:
Competition.
Explanation:
Competition refers to a relationship between rival organisms whose economic niches overlap with each other. When both organisms compete with each other for the limited resources available in ecosystem.
In the given case, the Sparrows replacing Bluebirds is a result of competition. Because they both share the same ecological niche, they are in competition with each other for the limited resources.
Therefore, competition is the correct answer.
Ill say it's A.most city planners did nothing about it
<span>The confounding variable in mike's experiment is
"gender of campers".
</span>
A confounding variable is an outside impact that alters the
impact of a dependent and independent variable. This incidental impact is
utilized to impact the result of a trial design. For instance, in the event that you are examining whether
absence of activity prompts weight pick up, absence of activity is your independent
variable and weight pick up is your dependent variable. Confounding variables
are any other variable that likewise affect your dependent variable.