Correct Answer: exprimant

Solution : The fourth option is the correct answer.

The correct spelling is "experiment". An experiment refers to a scientific procedure undertaken to make a discovery, test a hypothesis, or demonstrate a known fact.

The meanings of the other options are as follows:

• Occurring means happening or taking place.
• Sediment means matter that settles to the bottom of a liquid.
• An umbrella is a device consisting of a circular canopy of cloth on a folding metal frame supported by a central rod that provides protection against rain.