How did the evolution of photosynthesis impact early life on Earth? Decreased doygen levels in the atmosphere Caused a decrease in global temperature Allowed organisms to use sunlight for energy Led to the extinction of early cells

## Step 1<br />The evolution of photosynthesis had a significant impact on early life on Earth. Photosynthesis is a process used by plants and other organisms to convert light energy, usually from the sun, into chemical energy that can be later released to fuel the organisms' activities. This process is crucial as it is the primary source of energy for most life forms on Earth.<br /><br />## Step 2<br />The first option, "Decreased oxygen levels in the atmosphere", is incorrect. The evolution of photosynthesis actually increased the oxygen levels in the atmosphere. This is because photosynthesis produces oxygen as a byproduct, which was gradually released into the atmosphere.<br /><br />## Step 3<br />The second option, "Caused a decrease in global temperature", is also incorrect. The evolution of photosynthesis did not cause a decrease in global temperature. In fact, photosynthesis contributes to the warming of the Earth's surface by absorbing sunlight and converting it into heat.<br /><br />## Step 4<br />The third option, "Allowed organisms to use sunlight for energy", is correct. The evolution of photosynthesis allowed organisms to use sunlight for energy. This is the primary function of photosynthesis, and it is what makes it so important for life on Earth.<br /><br />## Step 5<br />The fourth option, "Led to the extinction of early cells", is incorrect. The evolution of photosynthesis did not lead to the extinction of early cells. In fact, photosynthesis played a crucial role in the survival of early cells by providing them with a source of energy.