Here are three easy ways to say it:
- An echidna uses its long nose to feel the tiny electric signals insects make when they wiggle.
- The echidna's snout can sense the small electricity that bugs give off as they move.
- When bugs move, they make tiny electric signals, and an echidna's nose can detect them.
Short step-by-step:
- Bugs move and their muscles make tiny electric signals.
- The echidna's snout can 'feel' those signals.
- This helps the echidna find the bugs to eat.