Final answer:
The secretion of cellular products to the extracellular space from vesicles within the cell occurs via a process called exocytosis, which is essential for various cellular functions. The correct choice from the options provided is C) Exocytosis.
Step-by-step explanation:
The process by which cells secrete cellular products from membrane-enclosed vesicles to the extracellular environment is known as exocytosis. This process is essential for various cellular functions such as the secretion of hormones, neurotransmitters, and enzymes.
Endocytosis is the cellular process of internalizing materials from the extracellular environment, which can take various forms such as phagocytosis, pinocytosis, and receptor-mediated endocytosis. However, since the question specifically asks about secretion from cells, the correct answer is C) Exocytosis, which is the biological process designed for this purpose.