It was formed by damming the headwaters of a small river, Changi Creek, which empties into Sungei Changi and thence into the Serangoon Harbor.
Below is an instruction that describes a task, paired with an input that provides further context. Write a response that appropriately completes the request. ### Instruction: List the MITRE techniques contained in the text. ### Input: It was formed by damming the headwaters of a small river, Changi Creek, which empties into Sungei Changi and thence into the Serangoon Harbor. ### Response: .