compounds are produced by plants, but are not necessary for the plant's immediate survival. However, they often help protect plants from being eaten.

these are secondary metabolites

Explanation:

These secondary metabolites are chemical compounds found in some fungi, bacteria and some plants. They are not involved in true normal growth and other processor in these organisms, but they often help protect plants from herbivory and these include terpenes, alkaloids, phenols etc.

Secondary metabolites

Explanation:

Secondary metabolites are organic compounds produced by plants or fungi or bacteria which are not use for growth and development of plants or for reproduction purposes but are use as defence mechanism against attacks and for survival in their environment. They are also use as metal transporting agents and sex hormone.

Examples of the secondary metabolites are terpenes, phenolics and nitrogen containing compounds.