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Multiple Choice
Which of the following is a primary way humans have altered the balance of a park ecosystem?
A
Reducing the genetic diversity of native species through natural selection
B
Introducing non-native plant and animal species
C
Decreasing the amount of sunlight reaching the park
D
Increasing the natural rate of photosynthesis
Verified step by step guidance
1
Understand the concept of an ecosystem: An ecosystem is a community of living organisms interacting with their physical environment. Any changes to the balance of this system can have significant effects on the organisms within it.
Identify the key ways humans can alter ecosystems: Humans can impact ecosystems by introducing non-native species, altering physical conditions (e.g., light, water, or soil), or changing biological processes (e.g., photosynthesis or genetic diversity).
Analyze the options provided: Evaluate each option to determine if it is a primary way humans typically alter ecosystems. For example, natural selection is a natural process, not directly caused by humans, while introducing non-native species is a common human activity.
Focus on the introduction of non-native species: Non-native species can disrupt ecosystems by outcompeting native species, altering food webs, or introducing diseases. This is a well-documented way humans have altered ecosystems, including parks.
Conclude that introducing non-native plant and animal species is the correct answer: This is the most direct and impactful way humans have altered the balance of a park ecosystem among the options provided.