i need an easy investigatory project in biology for class 11. please help me . i am in urgent need

plzzzzzzzzzzzz

You can choose any of the following topics for your investigatory projects.

1. Collection of different varieties of plants and making a herbarium and studying their characters

2. Study of different organs systems in humans

3. Study of different types of microorganisms found in samples like soil, curd etc

4. Study of nitrogen fixation in various plants.