C. The brain sends messages to the spinal cord
The correct answer is tympanometer. A tympanometer is not used to measure hearing, but to rather measure the transmission of energy through the middle ear. In this way, tympanometry is an objective test of the function of the middle-ear. Tympanometry is used alongside other measures to asses hearing, such as pure tone audiometry.
A good topic idea that could be used can be about ecosystems. Such as how geographic area, plants, animals, weather and landscape make up the types of organisms in that specific ecosystem.
Answer:
1. The grasses that are diseased.
Explanation:
1. In the event that the grasses were diseased, the environment will recoup itself from this sort of disturbance.
