When a pathogen enters the body which blood component helps us attack the pathogen

antibodies

Explanation:

Antibodies have three main functions:

-They neutralize the pathogen,

- Activate other defense cells and  

- Activate the complement system.

some of your causes might be acidic rain or natural wildfires that cause the parks to be degraded

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only about ten percent of the energy at one trophic level is passed on to organisms at the next trophic level. the remainder of the energy is used in life processes or lost as heat.