Answer: The correct options are:
Salt content in oceans
The position of Earth's plates over time
Types of plants in the area
Changes in climate
Step-by-step explanation:
The tiny fossils that is found in the samples found from the Earth's crust reveals many changes that took over a period of time.
The tiny fossils can help us know about the climate that exist at that time and a comparison can be made on that.
Different climatic conditions supports the growth of different plants. So the fossils found can also help known about the plants in the area.
The fossils in the crust can also help us to known about the plates and its position over the time. The plates position at that time can now be compared to that of present and observations can be made based on this.
The salt content in the ocean can also be known by studying the crust material. Larger salt content can state that there was ocean in particular area at that time.