A good site for secondary succession would be

1. Analyze the question The question asks which site is good for secondary succession. You need to know how it differs from primary succession.

2. Explain the concept

• Primary succession starts where no soil and no life exist. Examples are bare rock, a new sand dune, cooled lava, or a newly exposed barren surface. Pioneer organisms such as lichens must first create soil.
• Secondary succession starts where an existing community has been disturbed or destroyed, but soil and often seeds, roots, and spores remain. Examples are abandoned farmland, areas cleared by logging, flooded land, or land burnt by fire.

Because soil is already present, secondary succession is faster than primary succession.

3. Solution, step by step

• A. Sand dune: It has no real soil and few nutrients, so it is typically a primary succession site.
• B. Bare rock: There is no soil, so this is the classic primary succession site. Lichens begin the process.
• C. Land that has just had a forest fire: The vegetation is destroyed, but the soil, seeds, and root systems survive. Regrowth begins quickly, so this is secondary succession.
• D. Barren land: This has no vegetation and is generally treated as lacking developed soil, so it fits primary succession.

4. Answer The correct option is C. a land that has just had a forest fire.

5. Exam tip Ask yourself, "Is there already soil?"

• No soil means primary (bare rock, sand dune, lava).
• Soil present after a disturbance means secondary (fire, farming, flooding, logging).

Remember: Secondary = Second chance for a community that was already there.