it should be D.) hope the answer is right
Foreign invaders have proteins called antigen, which antibodies lock onto to neutralize. The foreign proteins are different from proteins in our own body, so the immune system can recognize them and finally eliminate them.
I believe the plastics in the oceans are harmful to ocean organisms and human health when people consume ocean organisms. Each plant and animal play its own role in sustaining the world's largest ecosystem. However, due to the ever-growing waste of humanity, we are gradually upsetting this balance. As a global community, we are unable to effectively implement sustainable habits. We produce a lot garbage, and all that garbage has to end up somewhere.
Answer:
vaccination
Explanation:
The vaccination has been one of the most revolutionary inventions in the medical field. This invention helped protect people from numerous diseases, some being totally neutralized, while some having only minor effects on the human body. The vaccination basically is a way of enhancing the immune system of the body by injecting in it a weakened form of the pathogen. In this way, the weakened form of the pathogen is not capable to harm the body, and the body is not fighting against it, but instead the pathogen becomes part of the body and its defense mechanism, so when the pathogen strikes, the body has a counter attack and defeats it.
