Q: What is caused by atoms or ions when they share or transfer valance electrons? Read this paragraph and choose the correct option from the provided answers: No, not all birds can fly. And not all birds have wings. This penguin is a good example. Their wings have evolved into flippers, adapted for swimming instead of flying. The kiwi of New Zealand is another bird without wings. Choices: - loss of charge - gain of charge - force of repulsion - force of attraction A:
A:
force of attraction