The Rivet Popper hypothesis assumes the $A$ to be an aeroplane and the $B$ to be the rivets,joining all parts together. Here,$A$ and $B$ refer to:

  • A
    $A-$species; $B-$ecosystem
  • B
    $A-$ecosystem; $B-$species
  • C
    $A-$species; $B-$community
  • D
    $A-$community; $B-$species

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