Food availability,parasites,
The right option is; [D] scientific notation
Kevin is describing scientific notation.
Scientific notation is a special method of writing numbers (values) that are very small or very large. Scientific notation is used when a number between 1 and 10 is multiplied by a power of 10. For example, 800 can be written in scientific notation as 8 x 10^2.
Metabolism
The metabolic processes in a cell determine its activity for conducting chemical reactions.
Answer:
they are abundant and accessible, they provide a large amount of concentrated energy. They are also relatively low cost and they can be transported relatively easily.