Here's why:

* Peroxisomes are small, membrane-bound organelles found in the cytoplasm of most eukaryotic cells. They are involved in various metabolic processes, including:

* Breakdown of fatty acids: This process generates hydrogen peroxide (H2O2) as a byproduct.

* Detoxification: Peroxisomes contain enzymes that detoxify harmful substances, often using H2O2 as a reactive intermediate.

* Production of H2O2: While primarily involved in breaking down H2O2, peroxisomes can also produce it in certain metabolic pathways.

* Other organelles like mitochondria also produce H2O2 as a byproduct of their metabolic processes. However, their primary function is not the packaging or regulation of H2O2. They primarily produce energy through cellular respiration.

Therefore, peroxisomes are the organelles primarily responsible for packaging and regulating the production of H2O2.