The correct answer is Sustainably harvested seafood.
Sustainably harvested seafood refers to fish and other aquatic resources that are managed in a way that ensures their populations are not depleted, making them a renewable resource. In contrast, natural gas and methane hydrates are fossil fuels, which are non-renewable, and while sand can be replenished to some extent, it is often extracted faster than it can naturally be replaced in many ecosystems, so it is typically not considered renewable.