“the introduction of harmful substances or products into the environment” is the definition for which term? a. pollution b. industrialization c. toxin d. neglect

Harmful substances or products into the environment is called pollution.
Think of it like cigarettes the cigarette itself is full of toxins but when it is lit and smoke is exhausting from it then it is polluting the environment

Geothermic gradient is the rate of increasing temperature with respect to increasing the depth in the earths interior. away from tech tonic plates boundaries, it is about 25-40 c/km (72-87 degrees f/mi) of depth near the surface in most of the world.

Plz put the answer choices thx.