Answer:
C
Explanation:
im a mechanic i know this stuff
 
        
             
        
        
        
Answer: A
Explanation:
The three reactants used in photosynthesis are water (H2O) carbon dioxide (CO2), and light (sunlight energy). These reactants are used to produce glucose/food for plants and oxygen that is later released. 
 
        
             
        
        
        
It's Like a Puzzle Pieces and that Every Piece Goes together and Holds everything in Place or a Big Clothes Hanger :D You Good?
        
             
        
        
        
Answer:
Each biome has a unique set of environmental conditions and plants and animals that have adapted to those conditions. The major land biomes have names like tropical rainforest, grasslands, desert, temperate deciduous forest, taiga (also called coniferous or boreal forest), and tundra.
Explanation:
A biome is different from an ecosystem. An ecosystem is the interaction of living and nonliving things in an environment. A biome is a specific geographic area notable for the species living there. A biome can be made up of many ecosystems. For example, an aquatic biome can contain ecosystems such as coral reefs and kelp forests.
 
        
             
        
        
        
The immune system<span> is made up of a chain of cells, tissues, and organs that work together to protect the body. </span>