Select the most appropriate option to fill in the blank.

The Lebanese army raided the boat and ______ dozens of water bottles, tuna cans, loaves of bread, boxes of Picon cheese and life jackets.

discovered

The most appropriate option to fill in the blank is discovered.

The sentence is about the Lebanese army raiding a boat and finding dozens of water bottles, tuna cans, loaves of bread, boxes of Picon cheese and life jackets. The verb "discovered" means to find something that was previously unknown or hidden, which is the most appropriate word to use in this context because it describes the action of the Lebanese army finding the supplies on the boat.

The other options are not as appropriate.

• Learnt means to gain knowledge or understanding of something, which does not make sense in this context because the Lebanese army did not learn about the supplies on the boat, they found them.
• Created means to bring something new into existence, which does not make sense in this context because the Lebanese army did not create the supplies on the boat, they found them.
• Invented means to create something new, which does not make sense in this context because the Lebanese army did not invent the supplies on the boat, they found them.