Eyes and ears are the sense organs of human beings.

The proverb “Closed eyes open up ears” tells about the importance of our ears when eyes are closed.

Ear is a sense organ of hearing. Human beings have two ears. Ears help us to hear different sounds and discriminate against them. It is an important organ for humans. We should also protect our ears from pointed objects, loud sounds, etc.

Explanation:

Human beings have five sense organs- Eyes, Ears, Nose, Skin and Tongue.

An eye is the organ of vision. Through eyes we can see the world, differentiate our surroundings depending on its shape, size, color, length, breadth, height, distance, etc.

Because of eyes we gain knowledge about our surroundings. Eyes are important to us and we should protect our eyes.  

An ear is the organ of hearing. We can hear different sounds and differentiate them because of our ears. We should also protect our ears from hearing loss.

When we close our eyes, we cannot see anything, but we can hear different sounds because of our ears. Ears receive sound through the pinna (outer part of ear) and direct them into ear`. The sounds pass through the inner part of ears and reach the brain that recognizes sound. Ears are important for hearing.

yes they are one of the key sense organ

geosphere and hydrosphere.

this is because the geosphere has to do with geological events, while the hydrosphere controls all water on earth.

answer: any goods being imported from another country may be subject to issued by the federal government are tariffs

explanation:  

tariffs are a tax on anything that are imported from abroad. government use them to protect and boost their local industries and the thought is that they encourage consumers to buy local instead of importing and they will hope will protect jobs and economy in the country that implements them