Either C or D. I think C, but I'm not too sure...
The amoeba is a eukaryote whose bodies most often consist of a single cell.
The cells of amoebae, like those of other eukaryotes, possess certain characteristic features. For example:-
1. Their cytoplasm and cellular contents are enclosed within a cell membrane.
2. Their DNA is packaged into a central cellular compartment called the nucleus.
3. They contain specialized structures called organelles, which execute a range of cellular functions including energy production and protein transport.
Chemical potential energy. Potential energy being converted into kinetic energy. A lump of coal and a can of gasoline
Producers. Without them there would be no food chain