Passage Summary: A prehistoric fish called Tiktaalik was the first animal we know of to have fingers, and it likely passed this trait down to the land animals that came after it.

Reasoning: Tiktaalik is the earliest known animal with fingers and likely served as an ancestor to modern land animals with fingers.

Analysis: In this 'Most Strongly Supported' task, we are looking for a deduction that follows from the provided facts. We are told Tiktaalik is a fish with fingers and is likely an ancestor to land animals with fingers. This implies that the evolutionary trait of fingers likely originated in an aquatic environment before transitioning to land. Look for an answer choice that acknowledges this timeline or the relationship between these prehistoric fish and later terrestrial species.