Answer:
Answer is A-B toxin.
Explanation:
A membrane-disrupting toxin is toxin that affect the cell membrane. The effect of its secretion  could be by interrupting the phospholipid layer or through pores formation on the membrane.
Membrane- disrupting toxins are regarded as  exotoxins. Examples are leukocidin and hemolysin which their effects cause leakages of the cytoplasmic content and lysis of the cell, through the formation of pores on the cell membrane.
The A-B toxin are produced by the proteins of pathogenic organisms such as the bacteria. Example is botulinum toxin.
 
        
             
        
        
        
Genetic engineering is the
direct treatment of an organism’s genome using biotechnology. It is a set of
technologies used to alter the genetic makeup of cells, together with the
transport of genes within and across species boundaries to produce improved
organisms. An example would be to
protect plant from insect damage, it can be made into a transgenic plant.
Transgenic plant are called genetically modified organisms (GMO) because there
is a gene added or removed in the original plant to obtain a set of
characteristic such as insect damage.
 
        
             
        
        
        
The appropriate response is the Olfactory Bulb. It is a mind structure in charge of our feeling of smell. Situated at the tip of the olfactory projection, the knob forms data about smells in the wake of getting tangible contribution from the nose. 
The olfactory bulb is a heap of afferent nerve strands from the mitral and tufted cells of the olfactory globule that interfaces with a few target areas in the mind, including the piriform cortex, amygdala, and entorhinal cortex.