Which one of the following plant tissues has large air spaces?

Aerenchyma is a specialized type of parenchyma tissue characterized by large intercellular air spaces or lacunae [1]. These air-filled cavities provide a low-resistance internal pathway for the exchange of gases such as oxygen and carbon dioxide between the shoot and the root [2]. This tissue is particularly prevalent in aquatic and wetland plants (hydrophytes), where the large air spaces provide buoyancy, allowing plant parts to float and remain upright in water. In contrast, sclerenchyma consists of dead cells with thick, lignified walls for mechanical support [1]. Collenchyma provides flexible support with thickened cell corners but lacks large air spaces. Meristematic tissue consists of actively dividing cells that are typically closely packed to facilitate growth. Therefore, aerenchyma is the specific plant tissue defined by its large air spaces [2].

Sources

1. [1] https://en.wikipedia.org/wiki/Ground_tissue
2. [2] https://en.wikipedia.org/wiki/Aerenchyma