Final answer:
To convert 18 pounds of clovers to ounces, multiply 18 by 16. Therefore, Liam collected 288 ounces of clovers.
Step-by-step explanation:
To convert pounds to ounces, you need to multiply the number of pounds by 16 since 1 pound is equal to 16 ounces. In this case, Liam collected 18 pounds of clovers, so to find out how many ounces he collected, multiply 18 by 16: 18 x 16 = 288 ounces.