Final answer:
The lab activity involving eggs primarily focuses on studying cellular transportation, investigating membrane permeability and the movement of substances such as oxygen across the cell membrane.
Step-by-step explanation:
The primary focus of the lab activity involving eggs and cell membranes is C) Studying cellular transportation. This type of experiment typically investigates how substances move across the cell membrane, exploring concepts such as osmosis, diffusion, and the selective permeability of membranes. The egg represents a cell, and the membrane's interaction with various substances offers insights into cellular processes like the transport of oxygen and how enzymes function. The experiment may also delve into understanding the features of a cell membrane, including membrane fluidity, which is significant for the function and survival of cells in differing environments.