It looks like you're starting to form a sentence, but it's not quite complete. Here's a polished version:

"The sea has always interested man. From it, he can get food."

If you'd like to expand on this idea, you could continue with more details about the sea and its importance to humans. For example:

"The sea has always interested man. From it, he can get food, minerals, and a means of transportation. It also plays a crucial role in regulating the Earth's climate and weather patterns."

Is there anything specific you'd like to add or explore further regarding the relationship between humans and the sea?