Please help me for this question...​

Sarah is sitting at the top of the slide in the schools playground. which will increase sarah’s kinetic energy a- an additional child is added to the top of the slide. b- sarah is pushed and moves down the slide. c- sarah climbs down the ladder and off the slide. d- the ladder is moved to the other side of the yard.

What is thought to have caused the mass extinction at the end of the cretaceous period?

The main ingredient of magma is a pahoehoe. b silca c dissolved gases d obsidian