Answer:
implantation – the process by which the zygote attaches to the uterine wall.
Living things in the environment such as plants, animals, and bacteria are biotic factors. Biotic factors also include once-living parts such as dead leaves on the forest floor. Abiotic factors are nonliving aspects of the environment such as sunlight, temperature and water. One important abiotic factor is soil.
The structure is D. a substrate
For photosynthesis to occur plants need sunlight water and carbon dioxide and chlorophyll. Through the process of photosynthesis plants cover light energy into chemical energy they use this energy to make food which they store as sugars
