Which body parts do birds have?
a feather, beaks, scales
b feathers, beaks, teeth (it said this one was incorrect)
c feathers, beaks, hair
d scales, teeth, beaks

The correct answer is option A,

Reason -

It is believed that birds feathers have evolved from the scale of reptiles and thus it can be considered as a body part of bird. There is a huge similarity in the chemical components of the scale and feather. However,  feather and beaks are the most predominant and visible body part of bird body and their type, structure and shape changes from one bird species to other

weathering - colorado river carves land in arizona to form the grand canyon. cracks form in a sandstone wall surrounding a house. a marble statue near the science museum is changing color due to rainfall

erosion - after a rainstorm, soil and rock piees litter the roadways. the sand dunes in the sahara desert are changing shape.

here's your answer.

bradykinin is a physiologically and pharmacologically active peptide of the kinin group of proteins, consisting of nine amino acids.