Tropisms are the means by which plants grow only toward a stimule Environmental stunuli can be things such as light. gravity, objects to climb. moisture, or the sun. Phototropism is a growth response of plants to gravity Gruvtropism is a growth response to touch 5 Thigmatropis is a growth response to light. Plants growth and development are influenced strongly by their environment Tropians account for many examples of plant growth such as curvature of stems toward a FALSE TRUE window and the climbing of plants up fences Tropisans do not help a plant sunivc in its habitat. Positive tropisa is growth toward a stimuli.​