Questions: Which of the following is not a piece of evidence supporting the idea that Europa may have a subsurface ocean? Photos of Europa's surface show regions that appear to consist of jumbled icebergs frozen in place. Europa's surface shows few impact craters. Astronomers have detected small lakes of liquid water on Europa's surface. Europa has a magnetic field that appears to be induced by Jupiter's magnetic field.

The answer is the third one: Astronomers have detected small lakes of liquid water on Europa's surface.

Explanation for each option:

1. Photos of Europa's surface show regions that appear to consist of jumbled icebergs frozen in place.
   This is evidence supporting the idea of a subsurface ocean. The jumbled icebergs suggest that there may be liquid water beneath the surface that allows the ice to move and refreeze in different positions.

2. Europa's surface shows few impact craters.
   This is also evidence supporting the idea of a subsurface ocean. A lack of craters suggests that the surface is relatively young and may be resurfaced by liquid water from below, which erases older craters.

3. Astronomers have detected small lakes of liquid water on Europa's surface.
   This is not evidence supporting the idea of a subsurface ocean. There is no direct evidence of liquid water lakes on the surface; rather, the evidence points to the possibility of liquid water beneath the surface.

4. Europa has a magnetic field that appears to be induced by Jupiter's magnetic field.
   This is evidence supporting the idea of a subsurface ocean. The induced magnetic field suggests the presence of a conductive layer, likely a salty liquid ocean beneath the ice.

In summary, the third option is not a piece of evidence supporting the idea of a subsurface ocean on Europa.