The answer option which best explains the age of oceanic crust and ocean-floor features is: A. Seafloor spreading.
Earth crust refers to the outermost layer (thin shell) which makes up the Earth such as igneous, metamorphic, and sedimentary rocks.
Generally, the two (2) main types of Earth crust include:
An oceanic crust has a thickness ranging from 5 kilometers to 10 kilometers and it comprises denser rocks such as gabbro, diabase, and basalt.
Seafloor spreading can be defined as a process which involves the formation of new oceanic crust due to volcanic activity and an upwelling of magma at mid-ocean ridges, as well as a subsequent outward movement from the ridge.
Basically, the theory of seafloor spreading can be used to explain in details how a new oceanic crust is created or formed at mid-ocean ridges.
Hence, seafloor spreading best explains the age of oceanic crust and ocean-floor features.
Read more: https://brainly.com/question/20000422
