Answer :
The type of fatty acid that would offer the greatest benefit for membranes of plants and microbes in the coldest places on earth: Polyunsaturated fatty acid.
Fatty acids can be divided into three types saturated, monounsaturated and polyunsaturated fatty acids.
Polyunsaturated fatty acid are the fatty acids that have more than one unsaturated carbon bond or double bond in the molecule. The oil in the remains liquid at room temperature and starts solidifying only when chilled. It includes fats like omega-3 and omega-6.
To learn more about Polyunsaturated fatty acid here
https://brainly.com/question/28266821
#SPJ4