  In our work, we continue to explore the properties of interval-valued fuzzy
soft sets, which are obtained by combining interval-valued fuzzy sets and soft
sets. We introduce the concept of energy of an interval-valued fuzzy soft set,
as well as pessimistic and optimistic energy, enabling us to construct an
effective decision-making algorithm. Through examples, the paper demonstrates
how the introduced algorithm is successfully applied to problems involving
uncertainty. Additionally, we compare the introduced method with other methods
dealing with similar or related issues.
