One moon-phase cycle One ocean-tide cycle An acorn growing into an adult tree A caterpillar becoming a butterfly
I am hesitating between 4 options to answer the following question, which option should I choose?
Question: Which of these will take the LONGEST time to observe?
Possibilities:
- One moon-phase cycle
- One ocean-tide cycle
- An acorn growing into an adult tree
- A caterpillar becoming a butterfly

An acorn growing into an adult tree