What type of transport relies on energy to move substances during embalming?

Active transport is the correct answer because it involves the movement of substances across a cell membrane against their concentration gradient, which requires energy, typically in the form of ATP. During embalming, the process often involves the introduction of embalming fluids into tissues; this fluid movement can include substances that need to be transported from areas of lower concentration to higher concentration within the tissues.

This energy-dependent mechanism is crucial because it allows for acquiring necessary nutrients, ions, or other compounds that might be in lower concentrations within the tissue compared to the embalming fluid being injected.

In contrast, passive transport, diffusion, and osmosis do not require energy. Passive transport and diffusion involve the movement of substances down their concentration gradient until equilibrium is reached. Osmosis specifically refers to the movement of water across a semipermeable membrane, also following a gradient. Understanding these differences helps emphasize the role of energy in active transport during procedures like embalming, where it is essential for achieving desired outcomes effectively.