Aporphyritic texture where large crystals are embedded in a matrix of small crystal may form when . climate change causes crystals to cool at different ratesb. crystals of different compositions cool at different ratesc. crystals of different compositions grow to different sizesd. a magma that has partially crystallized slowly moves to a different location where it then cools rapidly.

D.a magma that has partially crystallized slowly moves to a different location where it then cools rapidly.

Explanation:

Porphyritic texture -

It is specifically formed on the igneous rocks , for the rock which has some difference between crystal size , where one group of crystal is larger than the other group .

Porphyry is one the main type of rock which have porphyritic texture .

Formation of the Porphyritic rocks -

These types of rocks are formed when the rising magma is cooled via two stages , in the stage one , the cooling process is done slowly deep in the crust and forming large crystal grains .

In the step two , the cooling is done rapidly , at shallow depth

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