What did mole see as he was gazing into the hole on the opposite side of the river

In the above painting by salvador dalí, entitled persistence of memory, which of the following objects do not occupy positive space? a. the clocks c. the tree trunk b. the ground d. the cliff select the best answer from the choices provided

How is a suspension construction made? where is it most commonly used?

Name the note a) a b) e c) g d) d