Question

The source of materials which eventually formed our vast coal and oil deposits came from ( plant & animal matter, volcanic ash, rocks) buried in (ingenious, metamorphic, sedimentary) rocks all over the earth.

Answer 1

put sedimentary in blank

Answer 2

Answer : The source of materials which eventually formed our vast coal and oil deposits came from Plant and animal matter buried in sedimentary rocks all over the earth.

Explanation : As we know that we get the coal and oil from the fossil fuels which are nothing but the dead and decayed bodies of plants and animals.

By the process of sedimentation of rocks the layers got formed over the fossils turning it into fuels after decades.