Answer:
A prostaglandins
Explanation:
Fever is the abnormal body temperature that is caused by pyrogens.Pyrogens  are the chemicals produced by pathogen. Fever is protective mechanism of body to fight against pathogens. It is actually the immune response that spread to whole body with elevated temperataure. The elevated temperature helps to deal with pathogen more efficiently.
The interleukins released be immune cells in response pyrogen ultimately lead to release of prostaglandin E2. Prostaglandin E2 reset the hypothalamus thermoregulation. The hypothalamus feels the body temperature is cool although how high is the body temperature.
 
        
             
        
        
        
The answer is A because the electromagnetic spectrum is the thing that makes it visible
        
                    
             
        
        
        
Answer:
The magnitude of the net force acting on an object is equal to the mass of the object multiplied by the acceleration of the object as shown in the formula below. If the net force acting on an object is zero, then the object is not accelerating and is in a state that we call equilibrium.
Explanation:
This equation is the sum of n forces acting on an object. The magnitude of the net force acting on an object is equal to the mass of the object multiplied by the acceleration of the object, as shown in this formula.
 
        
             
        
        
        
The invertebrates from the table above is correctly classified below:
Invertebrates  Phylum 
Anemones Cnidaria 
Butterfly Arthropoda 
Clam Mollusca 
Coral Cnidaria 
Crab Arthropoda 
Earthworm Annelida 
Grasshoppers Arthropoda 
Hydra Cnidaria 
Jellyfish Cnidaria 
Lobster Arthropoda 
Mussel Mollusca 
Nematode Nematoda 
Octopus Mollusca 
Planaria Platyhelminthes
Scorpion Arthropoda 
Grasshoppers are invertebrates which belong to the phylum Arthropoda 
Classification of grasshopper:
Phylum: Arthropoda
Sub-phylum: Hexapoda
Class: Insecta
Body symmetry: Bilateral symmetry
Characteristics: Below are some of the characteristics of grasshopper
- They have three body regions
- They posses three pairs of legs
- They have one pair antennae
- Tracheal system is present
<h3>What are invertebrates?</h3>
Invertebrates are animals without backbone.
Below are some invertebrate phyla:
- Porifera
- Cnidaria or coelentrata
- Annelida
- Nematoda
- Echinodermata
- Mollusca
- Arthropoda
Learn more about invertebrates:
brainly.com/question/21332744
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