Which statement best describes an igneous intrusion? a. magma is exported to an open area and forms iron. b. igneous intrusions form when ice crystals splash into lava. c. magma explodes to the surface and forms a smooth outer layer of rock. d. magma is injected into surrounding rock forming an igneous intrusion.

Igneous intrusions occur when magma is slowly forced to the surface through gaps in the surrounding layers of rock, and ends up cooling off before it reaches the surface, so D. This typically is exhibited by the rocks in question being conical and eroding to show the igneous layers beneath.

Ithink its convection.hope this plz give brainliest!

it has to be understood that the sea water contains a huge amount of sodium and chlorine ions and if they enter the cell of the atlantic cod fish, the cell will shrivel and the fish will die. to avoid such a condition, the fish uses active transport for the purpose of removing the ions against the gradient.

explanation:

the atlantic cod is not a maritime osmoconformer. its native application of salts is less than that of the seawater it lives in. it is continually falling water from the gills to the ocean via osmosis.

countering that, the fish is going to be swallowing seawater. but since its internal collection of salts is lower than seawater, the fish will want to go free of excess salt, and since that's going upon a gradient, then active transport, requiring energy, must be used to pump out the salt. much marine fish use the organs to filter out the salt and these fish discharge very straight urine.