mark the correct statement regarding services

Options

A. the products of ecosystem processes are named as ecosystem services
B. the value of ecosystem services can be easily determined on the basis of function performed
C. out of total cost of various ecosystem services, the nutrient cycling accounts for 50%
D. a healthy forest ecosystem cannot purify air and water

Answer

To solve the question regarding the correct statement about services, we will analyze each statement provided in the question step by step.

### Step 1: Analyze the First Statement
**Statement:** The product of ecosystem processes are named as ecosystem services.

**Analysis:** This statement is true. Ecosystem services refer to the benefits that humans derive from ecosystems, which include processes like air and water purification, pollination, and nutrient cycling. These services are indeed products of various ecosystem processes.

### Step 2: Analyze the Second Statement
**Statement:** The value of ecosystem services can be easily determined on the basis of function performed.

**Analysis:** This statement is false. The value of ecosystem services is not solely based on the functions they perform. It is influenced by various factors, including the quality of the services, the context in which they are provided, and the socio-economic conditions of the area.

### Step 3: Analyze the Third Statement
**Statement:** Out of total cost of various ecosystem services, the nutrient cycle accounts for 50%.

**Analysis:** This statement is also false. The nutrient cycling is an essential ecosystem service, but it does not account for 50% of the total cost of various ecosystem services. In fact, nutrient cycling is one of many services, and its proportion is generally lower than that.

### Step 4: Analyze the Fourth Statement
**Statement:** A healthy forest ecosystem cannot purify air and water.

**Analysis:** This statement is false. A healthy forest ecosystem plays a crucial role in purifying air and water. Forests act as natural filters, absorbing pollutants and providing clean air and water.

### Conclusion
After analyzing all the statements, we find that the only correct statement is the first one: "The product of ecosystem processes are named as ecosystem services."

### Final Answer
The correct statement regarding services is: **The product of ecosystem processes are named as ecosystem services.**

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