Option 1: Although canola does have a high oil content, it is not its main characteristic related to human consumption.

Option 2: This is the correct answer. The oil from canola is indeed rich in unsaturated fatty acids, which are healthier for human consumption as they can lower levels of harmful cholesterol and are also beneficial for brain function and cell growth.

Option 3: While canola oil does have a good shelf life, it is not its defining characteristic for human consumption.

Option 4: Canola oil does have low Erucic acid content, but it is not its main characteristic. However, it`s worth noting that low levels of Erucic acid is crucial because high levels could be hazardous to heart health. But the primary quality of canola oil that makes it desirable for human consumption is its high content of unsaturated fatty acids.