This is english not biology- my bad -

1. adverb

An adverb is an expression that modifies a verb, adjective and itself (adverb).

Example: She speaks too softly.

Speak is a verb and the word 'softly' gives the expression of the verb more clearly. Softly is an adverb.  

2. communication

Communication is the only way to express ideas. This can be in the form of writing, speaking or gestures.

3. Indo-European

This is a family of hundreds of languages spoken in Europe and Asia. Nowadays, those languages become more modern and speak in different European countries.

4. Hellenic

One of the predecessors of ancient Greek was the Hellenistic period. In this period power and cultural influence reached its peak.

5. reflexive pronoun

A pronoun replaces a noun that refers to a subject/object (noun).

6. analytical

The analysis is a detailed study of any matter with reasoning and logic.

7. dialect

Languages spoken by mountaineers in each region/ continent are different but in the same regions, they speak different dialects to their languages.

8. verb

The state of being is a form of action. A word that describes the action known as a verb.

9. noun

The name of the person, thing or place is known as a noun.

10. Aramaic

A group of languages that were spoken by a group of Jews in Syria. Hebrew and Aramaic are related to each other.

11. philologist

Philologist is a study of language history in terms of ethnicity and originality.

12. dominion

Dominion is a supreme power capable to control. Domination linked to dominion.

the answer is 1. photosynthesis. glad to

do yall know the answer?