Directionar Each set of lettered choices below refers to the numbered questions or statements immediately following it. Select the one lettered choice that best answers each question or best fits each statement, A cholce may be used once, more than once.or not at all in each set. The following questions refer to the energy sources listed. (A) Uranium-238 (B) Coal (C) Natural gas (D) Oil (E) Solar Currently proven global reserves are expected to be largely exhausted within the next 50 years. A Uranium-238 B Coal C Natural gas D Oil E Solar

## Step 1<br />The problem is asking us to identify which energy source among the given options is expected to be largely exhausted within the next 50 years. The options are Uranium-238, Coal, Natural gas, Oil, and Solar.<br /><br />## Step 2<br />We need to consider the current global reserves of each energy source and the rate at which they are being consumed. <br /><br />## Step 3<br />Uranium-238 is a fissile material used in nuclear power plants. While it is a non-renewable resource, the current global reserves are expected to last for a very long time, far beyond 50 years.<br /><br />## Step 4<br />Coal, Natural gas, and Oil are fossil fuels. These resources are being consumed at a high rate, and their reserves are expected to be largely exhausted within the next 50 years.<br /><br />## Step 5<br />Solar energy is a renewable energy source, and it is not expected to be exhausted within the next 50 years.