Question

Trees are instrumental in preserving the
ecological balance . what is subject and predicate in this​

Answer 1

Answer:

Polymer, any of a class of natural or synthetic substances composed of very large molecules, called macromolecules, that are multiples of simpler chemical units called monomers.Polymers make up many of the materials in living organisms, including, for example, proteins, cellulose, and nucleic acids.

Answer 2

Answer:

trees are known as the lungs of the earth . they maintain the ecological balance by giving us oxygen and taking in the harmful gas carbon dioxide . and also help in nitrogen fixation.