Answer:Absolute Threshold
Explanation:
The sensitivity of any given sensory system to the relevant stimuli can be expressed as an absolute threshold
A landform is a natural feature of the solid surface of the Earth or other planetary body. Landforms together make up a given terrain, and their arrangement in the landscape is known as topography. Typical landforms include hills, mountains, plateaus, canyons, and valleys, ... Oceans and continents exemplify the highest-order landforms.
Tadpoles use GILLS to obtain oxygen
I believe it’s C because the heart pumps blood through the body
