Answer:
Option (D) is the right response : The size of a star cannot be determined by how it appears in the sky.
Step-by-step explanation:
Because "it is in reality their immense distance which is the reason of their decrease," as stated in the passage, "many of them are very many times larger than the star which is the earth with water," so the right answer is the last choice. At a star of a given size, a natural equilibrium is reached between the inward pull of gravity, defined by the star's mass, and the outward push of radiation, set by the process of nuclear fusion in the star's core. To summarize, the size of a star is mostly governed by its own mass.
Hope this helps! :D