The change in the shape of tissues or organs is called

Morphogenesis.

Morphogenesis is a process in development biology, in which cells, tissues and organs start taking their shapes.

In the image below you'll see an example of morphogenesis in a frogs metamorphosis and the differences between the hands (paws) of two different organisms along with a little explanation of what happens in each image.

Hope it helped,

BioTeacher101

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a. suckling by young

b. hypothalamus

c. dopamine

d. trh

e. anterior pituitary

f. mammary glands

g. milk production