13. A

14. D

15. A

that's my answer, hope it helps.

Answer:

13.lt refers to the amount of matter contained in an object. A.Mass B.weight C.Length D.Surface

Answer: A.Mass

14.it is the basic unit of Length. A.Inch B.Centimeter C. Millimeter D.Meter

Answer: D.Meter

15.it is the most common unit used in agriculture. A.Hectare B.Meter C.Millimeter D. Liter

Answer: A.Hectare

I Hope its Helps :)