Answer: Number 1 can be matched to option "A"
Number 2 can be matched to option "B"
Number 3 can be matched to option "C"
Number 4 can be matched to option "D"
Explanation: 1.Concrete means something that can be recognized as being true by the senses. Which means non concrete means something that can not be recognised by the senses.
2. Having two or more meaning means a thing is not clear enough because further explanation should be made so we can know what we really mean when we say a particular word or statement.
3. Complicated means something not easy to solve, a complex situation.
4. Showing clear is reasoning abstract because abstract shows a summary which allows a clear view of a research, book etc.