D, light can travel in the air or a vacuum and the speed is constant whether the light source is stationary or moving.
C it will be c because earth has water
Compounds are made up of two or more elements which are chemically bonded. The elements and the properties of the compound are different. Exposure to light and chemical reaction can break compounds into elements. Compounds are only chemically separated not physically. The mass of elements determined the mass of the compound.
Its definitely not A, nor is it D because food webs and food chains can be either land or aquatic animals. i think its B because a food chain goes up and a food web includes more organisms
Answer:
Yes you are right it is the 3rd one ( container for the fertilized egg).