All of the following are ways in which sedimentary rocks form except: a. lava cooling b. chemical processes c. physical processes d. build up of plant and animal remains

Except A. Lava cooling
As sedimentary rock is formed sedimentation,which is compacting of the pre-existing materials,it does not require lava eruption. Lava eruption only form igneous rocks.

here's why the following answers are accepted:

B. chemical process
during the formation of clastic sedimentary rock,the soluble minerals cement the loose particles together.

C. physical process
compaction takes place which is a physical process

D. remains
the remains of animals and plants form non-clastic sedimentary rock after million years (e.g. coal)

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