Marine mammals breed by having coitus
Hope this helps :)
There is no pigment in the brain, so it is in it's natural colour, grey.
Chemical weathering refers to the erosion or total disintegration of rocks that are caused by chemical reactions and not by mechanical processes. Usually water and other liquid substances causes this to occur. Skyscrapers or buildings are prone to chemical weathering because they are constantly exposed to precipitation and other elements in the atmosphere. In rocks, when this process happens they tend to crumble and form smaller rock pieces. It is important to note that during this stage, the end product is a totally different substance than its original phase.
I would go with A) Basalt because its seen a lot at the bottom of the ocean.
