When a plant self-fertilizes generation after generation, and always shows the same phenotype for the characteristic being considered, then the plant is called

When plants are allowed to self-fertilize generation after generation, the exact same physical traits appears without any change. Such plants are called pure line or true-breeding. For example, tall plants always produce tall plants and true-breeding dwarf plants always produce dwarf plants on selfing.  

it would be rhyolitic hope this

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.