Match the items in Column-I with those in Column-II and choose the correct option from the codes given below:
`{:("Column-I","Column-II"),((a)"Ecosystem Experiments ",(i)"Norman Myers"),((b)"Species-Area relationships",(ii)"Alexander von Humboldt"),((c)"Biodiversity hotspots",(iii)"Paul Ehrlich"),((d)"Rivet Popper Hypothesis",(iv)"David Tilman"):}`

Options

A. `{:("(a)","(b)","(c)","(d)"),("(ii)","(iv)","(i)","(iii)"):}`
B. `{:("(a)","(b)","(c)","(d)"),("(iii)","(i)","(iv)","(ii)"):}`
C. `{:("(a)","(b)","(c)","(d)"),("(iv)","(ii)","(iii)","(i)"):}`
D. `{:("(a)","(b)","(c)","(d)"),("(iv)","(ii)","(i)","(iii)"):}`

Answer

To solve the matching question, we need to match the items in Column-I with those in Column-II based on the contributions of various scientists and concepts in biodiversity and ecology. Let's go through each item step by step.

### Step-by-Step Solution:

1. **Ecosystem Experiments**:
- The concept of ecosystem experiments is most closely associated with **David Tilman**. He conducted significant research on how biodiversity affects ecosystem stability and productivity.
- **Match**: (a) Ecosystem Experiments - (iv) David Tilman

2. **Species-Area Relationships**:
- The species-area relationship was proposed by **Alexander von Humboldt**, a German naturalist who studied the relationship between the area of a habitat and the number of species it can support.
- **Match**: (b) Species-Area Relationships - (ii) Alexander von Humboldt

3. **Biodiversity Hotspots**:
- The concept of biodiversity hotspots, which are regions with a high level of endemic species that are under threat from human activities, was proposed by **Norman Myers** in 1988.
- **Match**: (c) Biodiversity Hotspots - (i) Norman Myers

4. **Rivet Popper Hypothesis**:
- The Rivet Popper Hypothesis, which suggests that the loss of species can lead to the collapse of ecosystems, was proposed by **Paul Ehrlich**. He used the analogy of rivets in an airplane to explain this concept.
- **Match**: (d) Rivet Popper Hypothesis - (iii) Paul Ehrlich

### Final Matches:
- (a) Ecosystem Experiments - (iv) David Tilman
- (b) Species-Area Relationships - (ii) Alexander von Humboldt
- (c) Biodiversity Hotspots - (i) Norman Myers
- (d) Rivet Popper Hypothesis - (iii) Paul Ehrlich

### Correct Option:
The correct option based on the above matches is:
- a - iv
- b - ii
- c - i
- d - iii