Questions: Leeuwenhoek and Hooke were instrumental in helping solve the cell theory theory of relativity gene theory evolution theory IDONT KNOW YET

The answer is the first one: cell theory.

Explanation for each option:

1. Cell theory: This is the correct answer. Antonie van Leeuwenhoek and Robert Hooke were pivotal figures in the development of cell theory. Hooke was the first to use the term "cell" when describing the microscopic structure of cork, and Leeuwenhoek was the first to observe and describe single-celled organisms, which he called "animalcules," using his improved microscope.

2. Theory of relativity: This is incorrect. The theory of relativity was developed by Albert Einstein in the early 20th century and is unrelated to the work of Leeuwenhoek and Hooke.

3. Gene theory: This is incorrect. Gene theory relates to the understanding of heredity and the role of genes, which was developed much later, primarily through the work of Gregor Mendel and later scientists.

4. Evolution theory: This is incorrect. The theory of evolution, most famously associated with Charles Darwin, deals with the process by which organisms change over time through natural selection, and is not related to the work of Leeuwenhoek and Hooke.

5. IDONT KNOW YET: This is not a valid scientific theory and is not relevant to the contributions of Leeuwenhoek and Hooke.

In summary, Leeuwenhoek and Hooke were instrumental in the development of cell theory.