Question

what is the meaning of \irreplaceable\ in these sentences? the dinosaur bones at the science museum are irreplaceable. they are the only ones of that kind that have been discovered! options: not likely to last a long time; cannot be traded for something equal; very interesting to look at; placed in front of something else

Explanation:

To determine the meaning of "irreplaceable", we analyze the context: the dinosaur bones are the only ones of their kind discovered. So "irreplaceable" should mean they can't be traded for something equal (since there are no others like them). Other options don't fit: "not likely to last a long time" contradicts the uniqueness, "very interesting to look at" is about interest, "placed in front of something else" is about position—none relate to uniqueness/non - substitutability.

Answer:

cannot be traded for something equal