well the clouds get sucked in
red giants.
No, a supermassive black hole is what makes a quasar.
While black holes give off radio waves, the fact that no light can escape, or be reflected off of, black holes makes them completely invisible to any regular light-capturing device.
Hurricanes, or clouds
Black holes are not made up of dark matter. Dark matter is a mysterious substance that makes up a large portion of the universe's mass, but black holes are formed from the collapse of massive stars.
Black holes are regions in space where gravity is so strong that nothing, not even light, can escape from them. Once something crosses the "event horizon" of a black hole, it is trapped inside. This makes black holes very mysterious and fascinating objects in the universe.
there not attractive because they are practically incisible to the human eye
wind makes the clouds move
Not all do - most black holes have masses comparable to that of a star; this makes sense, since they are believed to have formed from collapsing stars. There are, however, black holes that have thousands, millions, or even billions of times the mass of our Sun - called intermediate black holes, or (for about a million solar masses or more), supermassive black holes. It is currently unknown how exactly they got so massive.
Yes and no. It is rather hard to explain, because black holes are so dark and black that no living creature can see them, which in a sense makes them invisible, but you can also see where a black hole is because it sucks in light, too, so that would also, in a sense make it visible, but the my main answer would be, no black holes are not invisible.
Black holes are regions in space where gravity is so strong that not even light can escape. This makes them invisible to telescopes that rely on light to observe objects in space. Instead, scientists study the effects of black holes on nearby objects to indirectly learn about them.
It is difficult to ask black holes about how they are involved in active galaxy research because they cannot talk, this makes them only peripherally involved in understanding active galaxies