Value: 2 In a healthy ecosystem, what factors help to maintain relatively stable populations of different organisms? a. Abundant resources for all species b. Predator-prey relationships c. Competition for resources d. All of the above

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The correct answer is:

**d. All of the above**

**Explanation:**

In a healthy ecosystem, several factors work together to maintain relatively stable populations of different organisms:

1. **Abundant Resources for All Species (Option a):**
   - **Resource Availability:** When resources such as food, water, and shelter are abundant, species can thrive without excessive competition. This abundance helps prevent drastic population declines due to scarcity.
   
2. **Predator-Prey Relationships (Option b):**
   - **Natural Regulation:** Predator-prey dynamics help control the population sizes of both predators and their prey. For example, if a prey population grows too large, predators may increase in number due to the abundant food supply, which in turn reduces the prey population, maintaining balance.

3. **Competition for Resources (Option c):**
   - **Population Control:** Competition among species (and within species) for limited resources ensures that no single species monopolizes essential resources. This competition can regulate population sizes and promote biodiversity by allowing multiple species to coexist.

When these factors are present and functioning effectively, they contribute to the stability and resilience of ecosystems, allowing various organisms to maintain balanced populations.
All of the above factors help maintain stable populations in a healthy ecosystem.

Value: 2 In a healthy ecosystem, what factors help to maintain relatively stable populations of different organisms? a. Abundant resources for all species b. Predator-prey relationships c. Competition for resources d. All of the above

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