Erthyrocytes you can look this stuff up
Ecology is relationship between different organisms in a ecosystem
Carbohydrates are food for plants. Plants make their own food (carbohydrates) through photosynthesis which occurs in the CHLOROPLASTS of all green plants and leaves.
Using my knowledge abiotic factors include things such as wind, rainfall, sunshine, etc. If there are multiple choices to choose from then I could be more specific.