Part a - intrusive igneous bodies in the field which of the following is true based off your observation of intrusive igneous rocks on earth's surface? view available hint(s) which of the following is true based off your observation of intrusive igneous rocks on earth's surface? they are fragments of country rock that have been incorporated into magma. these rocks were formed from a lava flow that eventually cooled and solidified. intrusive igneous rocks are exposed by uplift and deposition. these rocks have been exposed by uplift and erosion. intrusive igneous rocks were formed from volcanic eruptions.