What's an example of a task that requires knowledge of physical objects to perform?
When do you take the samples from the plants you want to graft?

What's an example of a task that requires knowledge of physical objects to perform?
How can I make a cool bed for my small dog?

What's an example of a task that requires knowledge of physical objects to perform?
how do you help a baby walk?

What's an example of a task that requires knowledge of physical objects to perform?
how to make curry powder