[answer correctly for brainilest]
The sections of rock from different geological eras that are used to date fossils are called

A) fossils.
B) igneous.
C) sedimentary.
D) strata.

sedimentary is a right option.

Explanation: Because, strata is a layer of sediments or igneous that means the sections of Rocks are basically layers which form layers. The other two (strata,igneous) are also layers but they are part of sedimentation.

helicase, i think thats it

b. read the phase at the intersection of any given temperature and pressure.