Explanation:

• A geologist studies the Earth, its structure, composition, and processes.

• The primary object of a geologist’s study is the Earth.

Example Sentences:

• The geologist found fossils while digging in the soil.

• Geologists use special tools to examine the Earth's layers.

Sources:

1. Oxford Learner's Dictionaries

2. Accessible Dictionary

ফরাসী লেখক Guy de Maupassant wrote 'The Diamond Necklace'.
- ১৮৮৪ সালে ১৭ ফেব্রুয়ারি 'La Parure' শিরোনামে ফ্রেঞ্চ পত্রিকা 'Le Gaulois' এ এই উপন্যাসটি প্রকাশিত হয়েছিল।

- Like most of Maupassant’s short fiction, it was an instant success, and it has become his most widely read and anthologized story. 
 It tells the story of Mathilde Loisel, a young woman who borrows a necklace from a wealthy friend to wear to a high-society event, only to lose it and spend the next ten years of her life in poverty trying to replace it.
- The story is a cautionary tale about the dangers of materialism and social ambition, featuring one of Maupassant’s infamous plot twists for which he was well known.

• The important characters of this short story:
- 'Mathilde Loisel' (The protagonist of the story)
- 'Monsieur Loisel' (Mathilde’s husband)
- 'Madame Forestier' (Mathilde’s wealthy friend)

• Guy de Maupassant
- He is a French naturalist writer of short stories and novels who is by general agreement the greatest French short-story writer.

• Notable Work: 
- A Woman’s Life,
- Bel-Ami,
- Boule de Suif,
- L’Inutile Beauté,
- La Maison Tellier,
- Le Rosier de Madame Husson,
- Mont-Oriol,
- Notre coeur,
- Pierre et Jean,
- The Horla,
- Toine.

Source: Britannica and Sparksnotes.