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.
According to the occupational stress model, thwarted ambition is a source of stress that is related to career development.
Occupational stress is mental stress that is connected to one's employment. A persistent illness is referred to as "occupational stress." Understanding the stressful work environments and taking action to change them can help manage occupational stress. Employees may experience occupational stress if they don't feel supported by their managers or coworkers, feel like they have little influence over the work they do, or believe their efforts on the job are insufficiently rewarded. Employers and employees are both concerned about occupational stress since it has an impact on both their physical and mental health as well as their ability to do their jobs.
Learn more about occupational stress here:
brainly.com/question/28232272
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<span>C.the railroads had to pass over mountains and rivers</span>
Im assuming this is true or false? so True.
