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Fill in the blanks from the options given below from the table:
 
shrubtreeautotrophscocoon
sheltermankindflame of forestphotosynthesis
heterotrophsclimberred wormscross-pollination
insectseconomicscenthoney
pollinatorsbeesecologyeconomy
mulberryhybridpollen grainsyield
digestive enzymesnestssilkwormspollination
  
1. The animals rely on plants for food and . The relationship between plants and animals is beneficial for plants as well as .
 
2. There is relationship between mulberry leaves and . This relationship is of usefulness in the production of silk.
 
3. is affected if natural relationship present between the animals and plants are affected.