Final answer:
Liquid triglycerides contain a high proportion of unsaturated fatty acids, have double bonds in their chains, and are liquids at room temperature.
Step-by-step explanation:
The correct answer to the question "Liquid triglycerols _____- high proportion of unsaturated fatty acids" is b) Contain a. Liquid triglycerides contain a high proportion of unsaturated fatty acids. These unsaturated fatty acids have at least one double bond in their carbon chain, which causes a bend in their structure. This bend prevents them from packing tightly together, resulting in substances that are liquids at room temperature. In contrast, saturated triglycerides have no double bonds and are typically solids at room temperature because their straight chains allow for tight packing.