The remains (or impressions) of dead animals or plants that lived in the remote past are known as :

Options

A. Extinct species
B. Fossils
C. Naturally selected species
D. none of the above

Explanation

To solve the question, we need to identify the term that describes the remains or impressions of dead animals or plants from the past. Let's break it down step by step:

### Step 1: Understand the Question
The question asks for a specific term that refers to the remains or impressions of dead animals or plants that lived in the remote past.

**Hint:** Look for a term that relates to ancient life forms.

### Step 2: Analyze the Options
The question provides two options:
1. Extinct species
2. Fossil

**Hint:** Consider the definitions of both terms to see which one fits the description given in the question.

### Step 3: Define "Extinct Species"
An extinct species is defined as a species for which there are no living individuals left anywhere in the world. This term refers to the status of a species rather than the physical remains.

**Hint:** Think about whether this term describes physical remains or the status of living organisms.

### Step 4: Define "Fossil"
A fossil is defined as the preserved remains or impressions of organisms (plants or animals) that lived in the past, often buried in sediment and preserved over millions of years.

**Hint:** This term directly relates to the physical evidence of past life forms.

### Step 5: Conclusion
Based on the definitions, the correct answer to the question is "fossil," as it specifically refers to the remains or impressions of dead animals or plants from the remote past.

**Final Answer:** Fossil