3
Green manure.
Farmyard manure.
Compost manure.
Explanation:
Rocks can be classified in to three main groups - igneous, sedimentary and metamorphic. These three different rock types can be found in distinct areas of the UK. Igneous rocks - these rocks are a result of volcanic activity in the past, when Britain was close to a plate boundary.
Down
7 base
5 height
Across
6 composite figure
(I hope this helps)