Answer/Explanation:
b) kidney and bladder
Kidneys are the main organ in the excretory system and the bladder stores the urine in the body. These are two of the organs that make up the excretory system.
Answer - Will try to Answer in simplest form with Reasoning. Since no one responded.
1.Solar-Thermal energy. For example the sun radiates thermal energy aka heat which then turns Liquid aka Water in gas molecules because they are escaping. (Evaporation)
2. Condensation happens when the water molecule vapor clump together before thermal energy can be separated by it. Such as the clouds which they form tiny vapor/mist. Thats why when your on a plane and when you hit thru that cloud at hundreds of mph. Your hitting water molecules lol.
Biology is a branch of science that deals with living organisms and their vital processes.
Chemistry is the science that deals with the properties, composition, and structure of substances
Physics is the natural science that studies matter, its motion and behavior through space and time, and the related entities of energy and force
The answer is that the criteria of classification change whith the improved understanding of organisms around us
