Question

Pleaseee help me out heree

Answer 1

Answer: No change is needed

Explanation: This is because the first one would make it seem like you can either have sand or water when you need both. The second one contradicts earlier when it says that you need the sand making it seem you don't later on. The third one sounds like it is saying you either need all the materials or time when you need all of these things. So the last one is correct. This sentence already makes sense