Which of the following best sums up current scientific thinking about the nature of dark energy?

dark energy probably exists, but we have little (if any) idea what it is.
dark energy is most likely made up of weakly interacting particles that do not interact with light.
dark energy is the source of the mind weapon used by sith lords in star wars.
dark energy most likely consists of a form of photons that we can't see or detect.

What makes a personal exceptionality/non-exceptionality

Why might a single rock layer exhibit different types of sedimentary rocks within it? view available hint(s) why might a single rock layer exhibit different types of sedimentary rocks within it? such a rock layer, termed a facies, when traced laterally represents a variety of depositional environments that formed in a sequence over time. such a rock layer, termed a facies, when traced laterally represents a single depositional environment that formed over time. such a rock layer, termed a facies, when traced vertically represents a variety of depositional environments that formed at the same time across a broad area. such a rock layer, termed a facies, when traced laterally represents a variety of depositional environments that formed at the same time across a broad area. such a rock layer, termed a facies, when traced vertically represents a variety of depositional environments that formed in a sequence over time.

The position on the earth in which a place can be found