Which of the following is correctly matched?

• A. Parthenium hysterophorus – Threat to biodiversity
• B. Stratification - population
• C. Aerenchyma - Opuntia
• D. Age pyramid - Biome

To determine which option is correctly matched, let's analyze each choice:

Option A: Parthenium hysterophorus – Threat to biodiversity

This is correct. Parthenium hysterophorus, commonly known as Congress grass, is an invasive species that poses a significant threat to biodiversity by outcompeting native plants.

Option B: Stratification - population

This is incorrect. Stratification typically refers to the layering of different species or communities in an ecosystem, not specifically to population.

Option C: Aerenchyma - Opuntia

This is not a correct match. Aerenchyma is a type of tissue found in some plants that helps with gas exchange, but it is not specifically associated with Opuntia (cacti).

Option D: Age pyramid - Biome

This is also incorrect. An age pyramid represents the distribution of various age groups in a population, while a biome refers to a large ecological area on the Earth’s surface.

Final Answer

The correct match is Option A: Parthenium hysterophorus – Threat to biodiversity.