WASHINGTON, ​- U.S. President Donald Trump said on Monday "I will do what I have to do" if Iran does not stick to its agreement with ‌Washington."If Iran ⁠doesn't ⁠live up to their agreement, or if they're not behaving, I will ​do what I have to do," Trump told reporters.Trump and Iranian President Masoud ​Pezeshkian signed an interim U.S.-Iran deal last week, more than three months after the U.S. and Israel attacked Iran and Iran ​responded with its own attacks on Israel ⁠and Gulf ‌states with U.S. bases.Trump said on Monday ​Iran was ​supposed to use the money being unfrozen to ⁠buy food exclusively from the United States while Iran's ​semi-official Tasnim news agency cited Iranian central bank ​governor Abdolnaser Hemmati saying that Tehran is under no obligation to purchase agricultural inputs from the U.S. under the current memorandum of understanding."All that money's coming back in the form of purchases of food which they desperately need. They have ‌91 million people, they can't feed them. So, the money that we lift is going to go to ​our farmers," ​Trump asserted. Hemmati said ⁠the remaining frozen funds will not necessarily be used solely for essential goods and could be sent to purchase other non-sanctioned goods, ​Tasnim reported.U.S.-Israeli attacks on Iran and Israeli strikes in Lebanon have killed thousands and displaced millions. The Iran war has also shaken markets around the world and raised global oil prices.