Which observation about magnets provides evidence that a magnetic can act across a distance?

Can someone me i need the answer and don’t understand?

Describe your dna model. which part do the straws represent? the pushpins? the paper clips and the black dots you made with the marker?

Peat deposits are found in waterlogged places where dead plant material piles up. when peat is buried, it undergoes compaction. it is subjected to heat and pressure for a long time, and a lot of water is squeezed out during this process. nearly ten vertical feet of original peat material becomes one vertical foot of coal. which of these remains unchanged in the system during the conversion of peat to coal? a) area b) density c) mass d) volume