Out of more than 1.5 million known species, insects are __________ of the total animals.

Options

A. 0.7
B. 0.25
C. 0.5
D. 0.75

Answer

To solve the question "Out of more than 1.5 million known species, insects are __________ of the total animals," we can follow these steps:

### Step-by-Step Solution

1. **Understand the Total Number of Known Species**: We start with the information that there are more than 1.5 million known species in total.

2. **Identify the Major Groups of Animals**: Among these species, we need to recognize that insects belong to the phylum Arthropoda, which is a significant group within the animal kingdom.

3. **Determine the Proportion of Insects**: It is known that insects constitute a large percentage of the total animal species. Specifically, it is stated that Arthropoda (the phylum that includes insects) makes up about 70% of the total animal species.

4. **Conclude the Answer**: Since insects fall under the Arthropoda category, we can conclude that insects represent approximately 70% of the total known animal species.

5. **Final Answer**: Therefore, the answer to the question is: "Insects are 70% of the total animals."