Step 1: Understand what a biosensor is. A biosensor is a device that can detect biological substances.
Step 2: Identify what biosensors detect. They can detect specific things like glucose (sugar) or pathogens (germs).
Step 3: Learn how biosensors work. They convert the biological response (like the presence of glucose) into an electrical signal.
Step 4: Recognize the purpose of this conversion. The electrical signal can be measured and analyzed to provide information about the biological substance.