Answer:
The correct answer would be - cell wall and chloroplast
Step-by-step explanation:
The cell wall and chloroplast both are the main characteristic feature of the plant if present together in any cell of organisms. In most of the cells other than plant cells, the cell wall and chloroplast does not present together.
The cell wall is the outer rigid structure of plant cells made up of cellulose provide support and injuries. Chloroplast is the major and important structure of the plants responsible for their color and production of glucose by the process known as photosynthesis.
These two organelles would be most useful as all other organelles are similar and found in all cells given in the chart.