Answer
1.They have long chains of fatty acid
2.They are hydrophobic
Explanations
The long chains of fatty acid structure enables lipids to be excellent energy reserve s.C-H bond breaks down to give significant amounts of energy.Long hydrocarbon chains control the manner lipids act.The hydrophobic property makes them suitable to their tasks because the fatty acid inside cannot be absorbed into the bloodstream and later be filtered by the kidney thus it allows lipids to gather together and form complex structures.