Step 1: Analyze the diagram for the carbon cycle. • X represents carbon dioxide being taken from the atmosphere by plants, which is photosynthesis. • Y represents carbon being transferred from plants to animals. • Z represents carbon being released from animals back into the atmosphere, which is respiration or decomposition. • W represents carbon being released from plants back into the atmosphere, which is respiration or decomposition. Step 2: Identify the process represented by Y. The arrow labeled Y shows the movement of carbon from "Plants" to "Animals". This occurs when animals consume plants for food. Step 3: Conclude the process. The process by which animals obtain carbon from plants is feeding or consumption. Since the options are not provided in the image, I will state the correct process. The process represented by the letter Y is feeding (or consumption). That's 2 down. 3 left today — send the next one.