Help me PLEASE! Choose one answer! First one to answer get Brainliest! 13.) Remnants of organs or bones that have no use now in the organisms but may have for their common ancestors…

A.) Homologous Structures
B.) Embryo
C.) Vestigial Structures
D.) Fossil Record

Vestigial structures

Explanation:

Vestigial structures serve little or no purpose for an organism. An example being the human tailbone which at one point might have been a tail, but serves no real purpose now since we're bipedal organisms

stratosphere: as the altitude increases, the air temperature increases. the stratosphere has a layer of ozone, called the ozone layer. this layer absorbs most of the ultraviolet radiation from sunlight. this results in the stratosphere being warmer.

thinking it would be physical characteristics