Final answer:
Hauling liquids in tankers requires special care due to the high center of gravity and liquid movement.
Step-by-step explanation:
Hauling liquids in tankers requires special care for both the above reasons. Firstly, a loaded oil tanker has a high center of gravity due to the large mass of liquid it carries. This makes the tanker more prone to tipping over or losing stability. Secondly, the movement of the liquid inside the tanker can also affect its stability. As the liquid sloshes around, it creates forces that can cause the tanker to sway or tip.