Question

This submarine's camera is at -1 unit.

To take a picture of the fish, the camera
needs to get to 0 units.
Adding 1 float makes the sub float 1 unit
higher.
Adding 1 anchor makes the sub float 1
unit lower.
Select each possibility below and press
"Submit" to see how each one affects the
sub and the photo.
Add 1 float.
O Add 1 anchor.
O Add 1 float and 1 anchor.

Answer 1

Add 1 float

Explanation:

When you add 1 float, the sub becomes 1 unit higher in the water. This would bring the camera from -1 unit to 0 units, which is the required position to take a picture of the fish.

Add 1 anchor:

When you add 1 anchor, the sub becomes 1 unit lower in the water. This would make the camera go from -1 unit to -2 units, which is farther away from the fish and not suitable for taking a picture.

Add 1 float and 1 anchor:

Adding 1 float and 1 anchor would cancel each other out. The float would make the sub 1 unit higher, and the anchor would make it 1 unit lower, resulting in no change. The camera would remain at -1 unit, which is not in the correct position to take a picture of the fish.

So, the correct possibility to achieve the desired position for taking a picture of the fish is to "Add 1 float."