Which of the following is correctly matched?

Parthenium hysterophorus is an invasive weed that poses a significant threat to biodiversity. It is known to outcompete native plants, reduce crop yields and cause allergic reactions in humans and animals.
(1) Aerenchyma is a tissue found in some plants that facilitates the transport of gases, such as oxygen and carbon dioxide, between the plant’s organs. Opuntia is a genus of cactus that does not have aerenchyma tissue. 
(2) An age pyramid is a graphical representation of the age distribution of a population, while a biome is a large-scale ecosystem characterized by distinctive climate, vegetation and animal communities. There is no direct relationship between these two concepts. 
(4) Stratification refers to the vertical distribution of different species occupying different levels. It is a
feature of a biotic community but not population.