Can someone me and let me know if number 1 is right?

Why do carbohydrate molecules function so well as fuel for the body?

Check all that apply diatoms are marine algae that have a shell made of silica, what are some of the uses of the silica shell after the diatoms die? 1.the shells make up the diatomaceous earth used in filters 2.it can be used as an ingredient in abrasives 3.they are used in food products 4.the shells can be used in some insulating materials

The tubes transporting minerals and water upward are called ?