Final answer:
Flushing the feeding tube with water before each intermittent tube feeding helps prevent clogging.
Step-by-step explanation:
The nursing intervention that will help prevent a client's feeding tube from becoming clogged is to flush the feeding tube with water before each intermittent tube feeding. This helps to clear any residue or debris that may be present in the tube and prevent it from clogging. Flushing the tube with water helps to maintain its patency and ensure the smooth delivery of nutrition to the client.