Answer:
The correct answer is cells need energy to survive.
Step-by-step explanation:
Cell theory is one of the most important theory of the biological world which was proposed by Schwann and Schleiden in 1838. They stated that :
1. The cell is the basic or fundamental unit of life.
2. All living beings- unicellular to multi-cellular are made up of cells.
This theory was later revised by Rudolf Virchow in 1855 which added a statement to the existing cell theory as "all cells arise from the pre-existing cells".
Thus, the cells need energy to survive is the correct answer.