Loan:lone::fled:
Fish:aquarium::grains:
Obtain:acquire::excessive:
Sufficient:insufficient::normal:
Answers
1. Loan:lone::flee:flea
(In this case, in all probability, the word flee has been incorrectly written as fled.)
Loan (related to borrowing and lending of money) and lone (all alone) are homophones. They sound the same, but have different meanings. The homophone for flee (to run or escape) is flea (a small parasitic insect).
2. Fish:aquarium::grains:granary
Fish are kept in an aquarium, while grains are kept/stored in a granary.
3. Obtain:acquire::excessive:immoderate
The meaning of obtain is to acquire. Similarly the meaning of excessive is immoderate or extravagant.
4. Sufficient:insufficient::normal:abnormal
The opposite of sufficient is insufficient. Accordingly, the opposite of normal is abnormal.
Answer:
flea
granary
immoderate
abnormal