Answer:
is a disease in which the density and quality of bone are reduced.
Explanation:
<h2>
<u>JellyFish</u></h2>
Jellyfish are really Amazing ,but they are causing problems around the world.
These jellyfish are eating fish eggs, and larva. This is leaving the fishermen with nothing to catch. These fishermen now have no way to make money. The ecosystem is going out of balance. Scientist Found a new Jellyfish called a "bereo". These jellyfish eat the other Jelly fish (Mnemiopsis) By bringing these jelly fish into the sea its bringing the ecosystem back to balance. Scientist are still trying to figure out if they want to use the bereo in other seas.
Letter choice B is your answer
Like a coin the development of the present era also has two sides one is beneficial whereas another is not. The discovery is made by humans are beneficial to humanities but also are degrading the environment every day which indirectly affects the humans and the humanities. All discoveries are not good like the discoveries of cars have led to easier transportation mediums but have also increased pollution of air. Some discoveries like chemical explosions have degraded the environment to extinct various species and I have also affected the health of people living in that area. In other hand we cannot say that all the discoveries are bad as the discovery of Internet has made our education system as well as various other factors during the lockdown very easy and convenient. Therefore all the discoveries made are not only benificial.
