Who is the strongest among these people?
By the shape of the beak and color of the feathers, this would probably be a very strong crow.
The ocean's currents were too strong for the cat and it was carried away.
This is a single kanji with an い on the end, meaning you know it's probably an adjective. What's the adjective form of strong? It's also strong.
Since this word consists of a kanji with hiragana attached, you can bet that it will use the kun'yomi reading. You didn't learn that reading with this kanji, so here's a mnemonic to help you:
So you wanna be strong huh? Well, all you have to do is eat these two yogurts (つよ). One is filled with horse steroids, the other is full of bull steroids. They will make you so strong.