The answer is b. hope this helps
PowerPoint (or equivalent) Microsoft PowerPoint is probably now the most commonly used form of visual aid. ...
Overhead projector slides/transparencies. ...
White or black board. ...
Paper handouts. ...
Flip chart. ...
Video (DVD or VHS) ...
Artefacts or props
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You should probably add a text so others can see the central idea so they can find the message .
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Physical features shared due to evolutionary history (a common ancestor) are said to be homologous. To give one classic example, the forelimbs of whales, humans, birds, and dogs look pretty different on the outside. That's because they're adapted to function in different environments.
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