they

• Pron

  1. A group of entities previously mentioned.
  2. A single person, previously mentioned, but typically not if previously named and identified as male or female, especially if of unknown, irrelevant or (since 21st century) non-binary gender. Now increasingly used for an unnamed person even if the gender of the person is identified.
  3. People; some people; people in general; someone, excluding the speaker.
  4. The authorities: government, police, employers, etc.
  5. The opponents of the side which is keeping score.

• Det

are

• Verb

  1. second-person singular simple present of be
  2. first-person plural simple present of be
  3. second-person plural simple present of be
  4. third-person plural simple present of be
  5. present of be

• Noun
• Det

sometimes

• Adv

  1. On some occasions, over some periods, or in certain circumstances, but not always.
  2. (obsolete) On a certain occasion in the past; once.

• Adj

used

• Verb

  1. simple past and past participle of use
  2. To perform habitually; to be accustomed [to doing something].

• Adj

for

• Conj

  Because.

• Prep
• Particle

conservation

1. The act of preserving, guarding, or protecting; the keeping (of a thing) in a safe or entire state; preservation.
2. Wise use of natural resources.
3. The discipline concerned with protection of biodiversity, the environment, and natural resources
4. Genes and associated characteristics of biological organisms that are unchanged by evolution, for example similar or identical nucleic acid sequences or proteins in different species descended from a common ancestor
5. The protection and care of cultural heritage, including artwork and architecture, as well as historical and archaeological artifacts
6. lack of change in a measurable property of an isolated physical system (conservation of energy, mass, momentum, electric charge, subatomic particles, and fundamental symmetries)

grazing

• Verb

  present participle and gerund of graze

• Noun