Question

a turnabout maneuver is risky because *
2 points
there is no signal for a turnabout.
you cross or back into one or more lanes of traffic.
it must be made at an intersection.
other drivers might not yield to you.

a turnabout is a maneuver for *
2 points
entering a driveway.
turning your vehicle completely around.
steering into a left-hand turn.
an australian driver.

Explanation:

For the first question: A turnabout requires crossing or reversing into active traffic lanes, which creates direct conflict with oncoming or existing traffic, making it inherently risky. The other options are incorrect: turnabouts can be signaled, they don't have to be at intersections, and while other drivers not yielding is a risk, the core reason for the maneuver's risk is lane crossing/backing into traffic.
For the second question: By definition, a turnabout is a driving maneuver that reverses the direction of a vehicle, meaning turning it completely around. The other options do not match the standard definition of a turnabout.

Answer:

1. you cross or back into one or more lanes of traffic.
2. turning your vehicle completely around.