Tropical dry deciduous forests are characterized by trees that:

The correct answer is: a) Lose their leaves during the dry season.

Tropical dry deciduous forests are a type of tropical forest that experiences a pronounced dry season. During the dry season, many of the trees in these forests lose their leaves. This helps the trees to conserve water, as they do not need to produce as much sap to support their leaves.

The other options are incorrect for the following reasons:

• Option b: Tropical dry deciduous forests do not remain evergreen throughout the year. Many of the trees in these forests lose their leaves during the dry season.
• Option c: Tropical dry deciduous forests do not have thick, fleshy leaves. The leaves of these trees are typically thin and delicate.
• Option d: Tropical dry deciduous forests do not grow to very tall heights. The trees in these forests are typically shorter than the trees in other types of tropical forests.

I hope this helps! Let me know if you have any other questions.