An investor seeks an equity investment that will mirror the performance of the energy sector...

Comprehensive and Detailed Explanation From Exact Extract:

Exchange-traded funds (ETFs) are traded on exchanges, offering flexibility and lower costs compared to index mutual funds, making them ideal for tracking the energy sector. The feedback from the document states:

"Like stocks, and unlike index mutual funds, ETFs are traded on an exchange and can be bought and sold throughout the trading day. In this way, ETFs provide investors with a flexible way to participate in the performance of the underlying assets without having to acquire the assets directly, incurring high transaction costs. MERs on ETFs also tend to be lower than on other index and actively managed products."