Which is a real-world example of two planes intersecting?

-a railroad crossing
-a pin in a pin cushion
-a shelf on a wall
or
-none of the above

pooopoopopoopop

step-by-step explanati∵∵∴∴on:

answer: get more recipes with 3 magazines for $20! i often use chicken broth instead of water. 3 tablespoons butter, divided; 1/2 cup freshly grated parmigiano-reggiano bring water and salt to a boil in a large saucepan; pour polenta slowly into 5 minutes to thicken; stir and taste for salt before transferring to a serving bowl.