Me asap some plants close their leaves for protection when they are touched. this is an example of which tropism? hydrotropism phototropism gravitropism thigmotropism

It's Thigmotropism

The correct answer is thigmotropism.
Hydrotropism is when roots grow towards water.
Phototropism is how plants seem to "bend" towards a window where light comes in.
And gravitropism is how seedlings and saplings of plants know to grow upwards, against gravity, through and out of the soil.

It will dry out with less sunlight