The right option is; entropy
The measure of randomness or disorder in a system is known as entropy
Entropy is the property of the system and it is also often regarded to be the measure of molecular randomness or disorder in a closed but changing system. The higher the entropy of a system, the higher the disorder and the higher the unavailability of the system's energy to perform useful work.
Absorption. They absorb nutrience from dead/dying animals and/or plants.
Answer;
No, they would not form a monophyletic group of close relatives with a recent common ancestor.
Explanation;
-This is because their similarities are due to convergent evolution (adaptation to the bloodsucking lifestyle); phylogenetic analysis is based on homologous features, not analogous features.
-Convergent evolution is the process by which unrelated or distantly related organisms evolve similar body forms, coloration, organs, and adaptations. Phylogenetic analysis is based on homologous features, which the above organisms lacks. Homologous traits are those traits that are shared by two or more different species that share a common ancestor.